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108 vulnerabilities by envoyproxy
CVE-2026-73511 (GCVE-0-2026-73511)
Vulnerability from cvelistv5 – Published: 2026-09-21 20:20 – Updated: 2026-09-22 15:39
VLAI
EPSS
VEX
Title
Envoy: Potential path-matching/authentication bypass when using Envoy in combination with a backend stripping per-segment path (matrix) parameters (e.g. Apache Tomcat)
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy normally matches the raw request path, while servlet backends such as Apache Tomcat strip semicolon matrix parameters from each path segment before resolving the resource. Envoy's ignore_path_parameters_in_path_matching option instead truncates at the first semicolon and still does not match per-segment backend behavior. A remote client can use a parameterized protected segment, or a parameter on an earlier segment, to make Envoy select an unprotected fallback while the backend resolves the protected resource. The relevant scope boundary is that the bypass requires both a path-based Envoy decision and a backend that strips semicolon parameters per segment. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:15 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/26d5 | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/50f7bf… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/b205d1… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/fcb663… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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{
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"version": "\u003e= 1.38.0, \u003c 1.38.4"
},
{
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}
],
"metrics": [
{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
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"privilegesRequired": "NONE",
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}
]
},
{
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"description": "CWE-436: Interpretation Conflict",
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"url": "https://github.com/envoyproxy/envoy/commit/fcb663752c7055257f5dcc8b6ce6c7c905ebb1ff"
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{
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"tags": [
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},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
},
{
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
}
],
"source": {
"advisory": "GHSA-m745-gh6x-349x",
"discovery": "UNKNOWN"
},
"title": "Envoy: Potential path-matching/authentication bypass when using Envoy in combination with a backend stripping per-segment path (matrix) parameters (e.g. Apache Tomcat)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73511",
"datePublished": "2026-09-21T20:20:26.487Z",
"dateReserved": "2026-08-12T19:00:33.736Z",
"dateUpdated": "2026-09-22T15:39:37.554Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-73553 (GCVE-0-2026-73553)
Vulnerability from cvelistv5 – Published: 2026-09-21 20:18 – Updated: 2026-09-22 13:21
VLAI
EPSS
VEX
Title
Envoy: RBAC Authorization Bypass via Path Parameters
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, When ignore_path_parameters_in_path_matching is enabled, Envoy's router strips the semicolon suffix before matching but the RBAC url_path matcher evaluates the raw path. A downstream request such as /admin;x can therefore miss a DENY rule for /admin while the router still selects the protected /admin backend. The inconsistent canonicalization allows an unauthenticated client to bypass path-based authorization. The relevant scope boundary is that the route option and a path-based RBAC rule must both be present, and the protected route must match after stripping. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 13:20 UTC
CWE
- CWE-436 - Interpretation Conflict
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/0be4a0… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/6a703a… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/b6ec9b… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/e6d5fe… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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"cna": {
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"vendor": "envoyproxy",
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"tags": [
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"tags": [
"x_refsource_MISC"
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},
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"tags": [
"x_refsource_MISC"
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},
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"tags": [
"x_refsource_MISC"
],
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}
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"discovery": "UNKNOWN"
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"title": "Envoy: RBAC Authorization Bypass via Path Parameters"
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"datePublished": "2026-09-21T20:18:47.650Z",
"dateReserved": "2026-08-12T20:53:46.380Z",
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CVE-2026-73551 (GCVE-0-2026-73551)
Vulnerability from cvelistv5 – Published: 2026-09-21 20:17 – Updated: 2026-09-28 20:41
VLAI
EPSS
VEX
Title
Envoy: Path normalization does not handle dot and dotdot segments with parameters
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's URL normalization does not recognize dot and dotdot path segments when they carry semicolon parameters. A request such as /user/..;foo=bar/admin is therefore not canonicalized to /admin even when path normalization is enabled. If an upstream interprets the segment according to RFC 3986 while Envoy applies routing or RBAC to the uncollapsed path, a remote client can cause path confusion and bypass path-based security policy. The relevant scope boundary is that the security consequence depends on a downstream/upstream path interpretation mismatch or a path-based Envoy decision. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 20:41 UTC
CWE
- CWE-647 - Use of Non-Canonical URL Paths for Authorization Decisions
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/28b6d6… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/d40a68… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/e9d6c3… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/f74d11… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
{
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"shortName": "CISA-ADP"
},
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],
"cna": {
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{
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"vendor": "envoyproxy",
"versions": [
{
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"version": "\u003c 1.36.10"
},
{
"status": "affected",
"version": "\u003e= 1.37.0, \u003c 1.37.6"
},
{
"status": "affected",
"version": "\u003e= 1.38.0, \u003c 1.38.4"
},
{
"status": "affected",
"version": "\u003e= 1.39.0, \u003c 1.39.1"
}
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"descriptions": [
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}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
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}
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],
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},
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},
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/f74d1107c4f5c9679b66f7a03a6c5b75ddde1989"
},
{
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"tags": [
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],
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},
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
},
{
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
}
],
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},
"title": "Envoy: Path normalization does not handle dot and dotdot segments with parameters"
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CVE-2026-73546 (GCVE-0-2026-73546)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:53 – Updated: 2026-09-21 20:07
VLAI
EPSS
VEX
Title
Envoy: Stored XSS in Admin Stats Interface (/stats?format=html)
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's /stats?format=html admin endpoint uses StatsHtmlRender, which sanitizes string statistic values but emits statistic names without HTML encoding. A data-plane component such as grpc_stats with stats_for_all_methods enabled can incorporate attacker-controlled path segments into cached dynamic statistic names. When an operator views the HTML stats page, the stored name can execute script with the admin interface's origin and issue privileged same-origin requests. The relevant scope boundary is that the admin interface must be browser-accessible and an enabled component must persist attacker-influenced text in statistic names. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 20:07 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/11d346… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/884d30… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/9484e1… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/ab63a0… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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"tags": [
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},
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"x_refsource_MISC"
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CVE-2026-73512 (GCVE-0-2026-73512)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:51 – Updated: 2026-09-22 13:27
VLAI
EPSS
VEX
Title
Envoy: use-after-free in QUIC on internal redirects
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HttpDatagramHandler caches the current RequestDecoder when Capsule Protocol is enabled. Stream recreation, including an internal redirect, replaces the ActiveStream and updates EnvoyQuicServerStream but does not update the handler's cached pointer. A subsequent HTTP/3 datagram can call decodeData through the freed decoder, causing invalid virtual dispatch and a process crash. The relevant scope boundary is that hTTP/3 datagrams and Capsule Protocol must be enabled, and the request must enter a stream-recreation path such as an internal redirect. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 13:27 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/29dbaa… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/854951… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/c0e46d… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/f2417e… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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],
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"title": "CISA ADP Vulnrichment"
}
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"vendor": "envoyproxy",
"versions": [
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"attackVector": "NETWORK",
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"tags": [
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"url": "https://github.com/envoyproxy/envoy/commit/c0e46dabc3ac286bbe608e9274776555911aadb9"
},
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"url": "https://github.com/envoyproxy/envoy/commit/f2417eec2ff49abe243d484ded916fbc2faca38d"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10",
"tags": [
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],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
}
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"discovery": "UNKNOWN"
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"title": "Envoy: use-after-free in QUIC on internal redirects"
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73512",
"datePublished": "2026-09-21T19:51:23.229Z",
"dateReserved": "2026-08-12T19:00:33.736Z",
"dateUpdated": "2026-09-22T13:27:46.213Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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CVE-2026-73550 (GCVE-0-2026-73550)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:49 – Updated: 2026-09-28 20:37
VLAI
EPSS
VEX
Title
Envoy: HTTP/2 Discarded Host Header 200 GB Header-Copy OOM in Envoy
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy copies every decoded HTTP/2 Host header value before discarding it when :authority is already present. The discarded value bypasses saveHeader, so its bytes and count are not charged against request header limits. An unauthenticated client can use HPACK indexing to submit many references to a large Host value across a bounded number of streams, forcing extreme header-copy allocation and causing the proxy to be out-of-memory killed. The relevant scope boundary is that the demonstrated amplification uses HTTP/2 HPACK and the duplicate Host discard behavior. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 20:36 UTC
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/091099… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/1fec99… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/3fd0ff… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/fc75d8… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-73547 (GCVE-0-2026-73547)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:47 – Updated: 2026-09-22 15:39
VLAI
EPSS
VEX
Title
Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_parameters_to_remove from an authorization response. A path-less CONNECT request makes request_headers_->Path() return null, and Filter::onComplete dereferences that pointer while parsing the query string. An unauthenticated downstream client can crash the Envoy process when the filter and authorization response use query-parameter mutation. The relevant scope boundary is that the deployment must accept path-less CONNECT and configure ext_authz query-parameter mutation. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:15 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/064af2… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/5f3b8e… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/838f8f… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/c3170d… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-48521 (GCVE-0-2026-48521)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:44 – Updated: 2026-09-21 20:04
VLAI
EPSS
VEX
Title
Envoy: HTTP/3 connection pool selection null-derefs in ProdClusterManagerFactory::allocateConnPool when transport_socket_options is null
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's ProdClusterManagerFactory::allocateConnPool dereferences transport_socket_options while selecting an HTTP/3 connection pool without first checking whether the pointer is null. LoadBalancerContext implementations used by synthetic, mirror, health-check, and async-client calls can return no transport-socket options. With auto_config and HTTP/3 enabled, routine traffic reaching one of those contexts can crash an Envoy worker. The relevant scope boundary is that the affected branch requires HTTP/3 in the protocol set and a context that supplies no transport-socket options. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 20:02 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/8ef2da… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/cec489… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/e7b483… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/f5436f… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-73549 (GCVE-0-2026-73549)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:42 – Updated: 2026-09-22 13:29
VLAI
EPSS
VEX
Title
Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's Utility::copyInternetAddressAndPort and QUIC client-address paths reconstruct scoped IPv6 addresses through addressAsString and Ipv6Instance. The string includes a percent scope identifier that inet_pton cannot parse, causing an exception or abort. Kernel-provided scoped IPv6 destinations in ORIGINAL_DST transparent-proxy deployments, and affected QUIC connection paths, can therefore terminate the process. The relevant scope boundary is that the HTTP use_http_header override rejects scoped addresses earlier; the advisory's crash path requires a kernel-provided original destination or the affected QUIC path. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 13:29 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/109e5a… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/59b174… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/6e39f4… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/ab2dca… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-73513 (GCVE-0-2026-73513)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:40 – Updated: 2026-09-28 20:38
VLAI
EPSS
VEX
Title
Envoy: oghttp2 upstream trailers incorrect handling
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without END_STREAM. Envoy completes and deferred-deletes the ActiveRequest while oghttp2 keeps the stream open, leaving ClientStreamImpl with a dangling response_decoder_ reference. A later frame on the stream can dispatch through the freed object and crash the process. The relevant scope boundary is that the default nghttp2 codec rejects the malformed trailers, and the trigger is upstream-only with oghttp2 enabled. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 20:38 UTC
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/0d3326… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/3df69e… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/c4610b… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/e6963c… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-73552 (GCVE-0-2026-73552)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:37 – Updated: 2026-09-22 15:39
VLAI
EPSS
VEX
Title
Envoy: HTTP RBAC safe_regex can fail open on RFC-valid obs-text header values
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy HTTP RBAC accepts RFC-valid opaque header bytes but evaluates safe_regex values with RE2's UTF-8 subject semantics. A downstream client can preserve a prohibited marker and add an unrelated obs-text octet, causing RE2::FullMatch to return false and a negative RBAC policy to treat the invalid subject as an ordinary no-match. A byte-oriented route matcher can still observe the marker, allowing the request to reach a route intended to be denied. The relevant scope boundary is that plain positive ALLOW regexes normally fail closed, and exact, prefix, suffix, and contains matchers are not shown to have this subject-domain failure. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:15 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/5650cb… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/7d1dee… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/c2b9a1… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/f37267… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-73548 (GCVE-0-2026-73548)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:35 – Updated: 2026-09-24 22:35
VLAI
EPSS
VEX
Title
Envoy: Cross-user response poisoning via a generic (non-WebSocket) HTTP upgrade on Envoy's shared backend pool
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy forwards data for a configured non-WebSocket HTTP upgrade before the upstream accepts the upgrade. An unauthenticated HTTP/2 client can place a complete HTTP/1.1 request in extended CONNECT data; Envoy downgrades the request, writes the data unframed to a keep-alive HTTP/1.1 upstream, and returns the socket to the shared pool while the smuggled response remains queued. A different downstream client can then receive the attacker's response. The relevant scope boundary is that webSocket upgrades, plain CONNECT, disabled backend keep-alive, per-downstream pools, and max_requests_per_connection set to 1 are not affected by the demonstrated path. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 22:34 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/309855… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/3c7998… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/4633b8… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/bd6711… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-50572 (GCVE-0-2026-50572)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:32 – Updated: 2026-09-22 13:30
VLAI
EPSS
VEX
Title
Envoy: ext_authz - RawHttpClientImpl onSuccess 0x0 segfault
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the authorization response, it can invoke callbacks_ after the callback owner has been destroyed, causing a use-after-free and process crash under production traffic. The relevant scope boundary is that the vulnerable path uses the HTTP ext_authz client; the advisory does not establish the same trigger for unrelated filters. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 13:30 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/8dacef… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/a49085… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/c1b295… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/c52457… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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CVE-2026-53714 (GCVE-0-2026-53714)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:17 – Updated: 2026-09-15 19:28
VLAI
EPSS
VEX
Title
Envoy Gateway: xDS Control Plane Information Disclosure when Envoy Gateway operates in GatewayNamespaceMode
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, the xDS gRPC server in GatewayNamespaceMode, configured through provider.kubernetes.deploy.type=GatewayNamespace, installs a JWT StreamInterceptor but no UnaryInterceptor, leaving every unary Fetch RPC unauthenticated. The streaming interceptor also authenticates only discoveryv3.DeltaDiscoveryRequest messages; a discoveryv3.DiscoveryRequest used by the State-of-the-World protocol fails the type assertion and returns success without JWT validation. Any pod that can reach port 18000 can use the unauthenticated unary or State-of-the-World paths to retrieve TLS private keys through StreamSecrets, all xDS resources through StreamAggregatedResources, backend endpoints through StreamClusters or StreamEndpoints, and routing configuration through StreamRoutes or StreamListeners. This issue is fixed in versions 1.7.4 and 1.8.1.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 19:28 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/gateway/security/ad… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/gateway/pull/8986 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9116 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9118 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/4df0… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/e912… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/f1f9… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | gateway |
Affected:
< 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1 |
{
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{
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"vendor": "envoyproxy",
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}
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}
],
"metrics": [
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"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
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"baseScore": 7.4,
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"confidentialityImpact": "HIGH",
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{
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},
{
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"tags": [
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{
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{
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"tags": [
"x_refsource_MISC"
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"url": "https://github.com/envoyproxy/gateway/commit/e9124abc4ff4b63a218a6890c1b28a982c850465"
},
{
"name": "https://github.com/envoyproxy/gateway/commit/f1f9829af2a231f0cae915c09800353c76622d97",
"tags": [
"x_refsource_MISC"
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{
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},
{
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"tags": [
"x_refsource_MISC"
],
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],
"source": {
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"discovery": "UNKNOWN"
},
"title": "Envoy Gateway: xDS Control Plane Information Disclosure when Envoy Gateway operates in GatewayNamespaceMode"
}
},
"cveMetadata": {
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"cveId": "CVE-2026-53714",
"datePublished": "2026-09-14T20:17:22.256Z",
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CVE-2026-53716 (GCVE-0-2026-53716)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:15 – Updated: 2026-09-16 16:21
VLAI
EPSS
VEX
Title
Envoy Gateway: Wasm HTTP fetch decompresses gzip without output-size limit
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, getFileFromGZ in internal/wasm/httpfetcher.go calls io.ReadAll on a gzip.Reader without limiting decompressed output when a tenant-controlled EnvoyExtensionPolicy.spec.wasm[].code.http.url points to a reachable compressed Wasm payload. The 256 MiB compressed-input cap does not constrain the expanded size, no operator Wasm URL allowlist exists, and the optional sha256 check occurs only after decompression, so a comparatively small gzip stream can force a multi-gigabyte allocation in the shared controller. The resulting out-of-memory termination restarts the controller, re-reconciles the persistent custom resource, and can create a persistent cross-tenant control-plane outage. This issue is fixed in versions 1.7.4 and 1.8.1.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 16:21 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/gateway/security/ad… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/gateway/pull/9171 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9172 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9173 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/5a78… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/96e2… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/b473… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | gateway |
Affected:
< 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1 |
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{
"metrics": [
{
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}
],
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"timestamp": "2026-09-16T16:21:03.789017Z",
"version": "2.0.3"
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
"product": "gateway",
"vendor": "envoyproxy",
"versions": [
{
"status": "affected",
"version": "\u003c 1.7.4"
},
{
"status": "affected",
"version": "\u003e= 1.8.0-rc.0, \u003c 1.8.1"
}
]
}
],
"descriptions": [
{
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}
],
"metrics": [
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
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"confidentialityImpact": "NONE",
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"scope": "UNCHANGED",
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"tags": [
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},
{
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"tags": [
"x_refsource_MISC"
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},
{
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"tags": [
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},
{
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"tags": [
"x_refsource_MISC"
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"discovery": "UNKNOWN"
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"cveId": "CVE-2026-53716",
"datePublished": "2026-09-14T20:15:51.441Z",
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"state": "PUBLISHED"
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CVE-2026-53715 (GCVE-0-2026-53715)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:14 – Updated: 2026-09-15 14:35
VLAI
EPSS
VEX
Title
Envoy Gateway: Wasm cache ServeHTTP reads mappingPath2Cache without lock
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, HTTPServer.ServeHTTP in internal/wasm/httpserver.go reads the plain mappingPath2Cache map without synchronization while HTTPServer.Get writes the same map during EnvoyExtensionPolicy translation. An attacker with pod-network access to unauthenticated port 18002 and tenant permission to churn policies with distinct Wasm URLs can flood GET requests until a per-request reader overlaps a writer. Go's concurrent map read and write detection invokes runtime.throw, which the net/http connection recovery cannot catch, terminating the controller process and causing a timing-dependent, cross-tenant control-plane denial of service until Kubernetes restarts the pod. This issue is fixed in versions 1.7.4 and 1.8.1.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 14:26 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/gateway/security/ad… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/gateway/pull/9171 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9172 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9173 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/5a78… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/96e2… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/b473… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | gateway |
Affected:
< 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1 |
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"shortName": "CISA-ADP"
},
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{
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"vendor": "envoyproxy",
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{
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}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7"
},
{
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"tags": [
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"tags": [
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},
{
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"tags": [
"x_refsource_MISC"
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}
],
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"discovery": "UNKNOWN"
},
"title": "Envoy Gateway: Wasm cache ServeHTTP reads mappingPath2Cache without lock"
}
},
"cveMetadata": {
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53715",
"datePublished": "2026-09-14T20:14:34.223Z",
"dateReserved": "2026-06-10T16:43:31.241Z",
"dateUpdated": "2026-09-15T14:35:21.990Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
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CVE-2026-53719 (GCVE-0-2026-53719)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:13 – Updated: 2026-09-16 18:10
VLAI
EPSS
VEX
Title
Envoy Gateway: Nil-dereference when SecurityPolicy targets TCPRoute without spec.authorization
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, translateSecurityPolicyForRoute in internal/gatewayapi/securitypolicy.go dereferences a nil authorization value when a namespace-scoped tenant creates a SecurityPolicy targeting a TCPRoute and omits spec.authorization. The persistent object triggers the panic on every reconcile; recovery in message/watchutil.go keeps the process alive but unwinds the runner/runner.go handle callback, stalling controller-wide xDS and infrastructure intermediate-representation publishing until an administrator deletes the object. The data plane continues to serve the last known good configuration while publication is stalled. This issue is fixed in versions 1.7.4 and 1.8.1.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 18:10 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/gateway/security/ad… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/gateway/pull/9171 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9172 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9173 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/5a78… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/96e2… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/b473… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | gateway |
Affected:
< 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1 |
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"vendor": "envoyproxy",
"versions": [
{
"status": "affected",
"version": "\u003c 1.7.4"
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}
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"metrics": [
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"integrityImpact": "NONE",
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"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"tags": [
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{
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"tags": [
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"tags": [
"x_refsource_MISC"
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"url": "https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7"
},
{
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"tags": [
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{
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"tags": [
"x_refsource_MISC"
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"url": "https://github.com/envoyproxy/gateway/releases/tag/v1.8.1"
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"source": {
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"discovery": "UNKNOWN"
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"title": "Envoy Gateway: Nil-dereference when SecurityPolicy targets TCPRoute without spec.authorization"
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"cveId": "CVE-2026-53719",
"datePublished": "2026-09-14T20:13:20.535Z",
"dateReserved": "2026-06-10T16:43:31.241Z",
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CVE-2026-53718 (GCVE-0-2026-53718)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:12 – Updated: 2026-09-15 13:55
VLAI
EPSS
VEX
Title
Envoy Gateway custom backendRef cross-namespace ReferenceGrant bypass
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, an HTTPRoute can use an extension-managed custom backendRef to reference a backend resource in another namespace without a matching Gateway API ReferenceGrant in the target namespace. The custom-backend branch in internal/gatewayapi/route.go omits validateBackendNamespace, allowing the route-owning namespace to bind to and use the resource without the backend namespace owner's consent and violating the Gateway API cross-namespace authorization model. This issue is fixed in versions 1.7.4 and 1.8.1.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 13:25 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/gateway/security/ad… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/gateway/pull/9171 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9172 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9173 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/5a78… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/96e2… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/b473… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | gateway |
Affected:
< 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1 |
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}
],
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"timestamp": "2026-09-15T13:25:21.526527Z",
"version": "2.0.3"
},
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}
}
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"dateUpdated": "2026-09-15T13:55:25.432Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "gateway",
"vendor": "envoyproxy",
"versions": [
{
"status": "affected",
"version": "\u003c 1.7.4"
},
{
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"version": "\u003e= 1.8.0-rc.0, \u003c 1.8.1"
}
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"descriptions": [
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"value": "Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, an HTTPRoute can use an extension-managed custom backendRef to reference a backend resource in another namespace without a matching Gateway API ReferenceGrant in the target namespace. The custom-backend branch in internal/gatewayapi/route.go omits validateBackendNamespace, allowing the route-owning namespace to bind to and use the resource without the backend namespace owner\u0027s consent and violating the Gateway API cross-namespace authorization model. This issue is fixed in versions 1.7.4 and 1.8.1."
}
],
"metrics": [
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"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L",
"version": "3.1"
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"tags": [
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"url": "https://github.com/envoyproxy/gateway/releases/tag/v1.8.1"
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],
"source": {
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"discovery": "UNKNOWN"
},
"title": "Envoy Gateway custom backendRef cross-namespace ReferenceGrant bypass"
}
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"cveMetadata": {
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53718",
"datePublished": "2026-09-14T20:12:12.224Z",
"dateReserved": "2026-06-10T16:43:31.241Z",
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"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
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CVE-2026-53713 (GCVE-0-2026-53713)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:11 – Updated: 2026-09-16 18:34
VLAI
EPSS
VEX
Title
Envoy Gateway: Authentication Bypass via Improper Input Validation in EnvoyExtensionPolicy Lua Allows Secret Disclosure
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, to_absolute_normalized_path in internal/gatewayapi/luavalidator/security.lua does not collapse redundant separators before is_critical_path evaluates Lua submitted through EnvoyExtensionPolicy during default Strict validation. Linux resolves a double-slash absolute path as the corresponding single-slash path, but the validator does not match the redundant-separator form, allowing submitted Lua to read arbitrary files from the gateway controller pod. Exposed files can include Kubernetes service-account tokens, TLS certificates, and process environment data, and the disclosed credentials can provide access to sensitive Kubernetes API Server or Gateway xDS server information. This issue is fixed in versions 1.7.4 and 1.8.1.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 18:34 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/gateway/security/ad… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/gateway/pull/9171 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9172 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9173 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/5a78… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/96e2… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/b473… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | gateway |
Affected:
< 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1 |
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{
"metrics": [
{
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},
{
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},
{
"Technical Impact": "partial"
}
],
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"timestamp": "2026-09-16T18:34:03.346532Z",
"version": "2.0.3"
},
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "gateway",
"vendor": "envoyproxy",
"versions": [
{
"status": "affected",
"version": "\u003c 1.7.4"
},
{
"status": "affected",
"version": "\u003e= 1.8.0-rc.0, \u003c 1.8.1"
}
]
}
],
"descriptions": [
{
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}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L",
"version": "3.1"
}
}
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"description": "CWE-20: Improper Input Validation",
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"tags": [
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},
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"tags": [
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},
{
"name": "https://github.com/envoyproxy/gateway/pull/9173",
"tags": [
"x_refsource_MISC"
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},
{
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464"
},
{
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7"
},
{
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"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead"
},
{
"name": "https://github.com/envoyproxy/gateway/releases/tag/v1.7.4",
"tags": [
"x_refsource_MISC"
],
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},
{
"name": "https://github.com/envoyproxy/gateway/releases/tag/v1.8.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/gateway/releases/tag/v1.8.1"
}
],
"source": {
"advisory": "GHSA-wcrf-9vrr-854f",
"discovery": "UNKNOWN"
},
"title": "Envoy Gateway: Authentication Bypass via Improper Input Validation in EnvoyExtensionPolicy Lua Allows Secret Disclosure"
}
},
"cveMetadata": {
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CVE-2026-53717 (GCVE-0-2026-53717)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:09 – Updated: 2026-09-15 19:30
VLAI
EPSS
VEX
Title
Envoy Gateway: OCI layer extraction allocates make([]byte, h.Size) from untrusted tar header
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, internal/wasm/imagefetcher.go follows tenant-controlled EnvoyExtensionPolicy spec.wasm[].code.image.url values to Docker or OCI Wasm layers, and extractWasmPluginBinary uses the untrusted tar-header h.Size value to allocate memory before validating the entry name or declared size. A small PAX or GNU tar header can therefore claim a multi-terabyte entry even though the surrounding LimitReader restricts only the bytes read from the stream, and no registry allowlist prevents a permitted tenant from selecting an attacker-controlled registry that the controller can reach. The allocation is attempted for every tar entry and can cause an unrecoverable Go runtime out-of-memory failure; because the custom resource persists, reconciliation repeatedly crash-loops the shared controller and causes a single-request, non-volumetric, cluster-wide control-plane denial of service. This issue is fixed in versions 1.7.4 and 1.8.1.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 19:29 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/gateway/security/ad… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/gateway/pull/9171 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9172 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/pull/9173 | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/5a78… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/96e2… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/commit/b473… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
| https://github.com/envoyproxy/gateway/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | gateway |
Affected:
< 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1 |
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CVE-2026-48090 (GCVE-0-2026-48090)
Vulnerability from cvelistv5 – Published: 2026-06-26 18:03 – Updated: 2026-07-08 19:42
VLAI
EPSS
VEX
Title
Envoy HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk)
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, the HTTP OAuth2 filter (envoy.filters.http.oauth2) can leave an in-flight async token exchange attached to a downstream stream that has already been torn down. A late AsyncClient completion can still invoke OAuth2Filter methods that use StreamDecoderFilterCallbacks after that object’s lifetime has ended, causing undefined behavior, worker crashes (availability loss), and use-after-free / invalid-vptr failures under AddressSanitizer. This is a memory-safety / lifetime issue in the data plane, not a trivial config bug. Remote code execution is not claimed here; the primary demonstrated impact is DoS via crash and UB; any further impact would be deployment- and allocator-dependent. This vulnerability is fixed in 1.37.5 and 1.38.3.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 12:01 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.38.0, < 1.38.3
Affected: >= 1.37.0, < 1.37.5 |
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CVE-2026-47220 (GCVE-0-2026-47220)
Vulnerability from cvelistv5 – Published: 2026-06-26 18:02 – Updated: 2026-07-15 00:49
VLAI
EPSS
VEX
Title
Envoy: Segmentation fault when using %REQUESTED_SERVER_NAME% in log format
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, when the %REQUESTED_SERVER_NAME(X:Y)% is used in log format and host related options is specified, like HOST_FIRST, SNI_FIRST, it's possible to crash Envoy when the specified host header is missing in the request headers. This vulnerability is fixed in 1.37.5 and 1.38.3.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 13:26 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-47220 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2493652 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.38.0, < 1.38.3
Affected: >= 1.37.0, < 1.37.5 |
|
| Red Hat | OpenShift Service Mesh 2 |
cpe:/a:redhat:service_mesh:2
|
|
| Red Hat | OpenShift Service Mesh 3 |
cpe:/a:redhat:service_mesh:3
|
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CVE-2026-47205 (GCVE-0-2026-47205)
Vulnerability from cvelistv5 – Published: 2026-06-26 18:01 – Updated: 2026-06-27 02:54
VLAI
EPSS
VEX
Title
Envoy: ext_authz Use-After-Free during Stream Teardown with Per-Route Overrides
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.36.0 until 1.36.9, 1.37.5, and 1.38.3, a Use-After-Free (UAF) vulnerability leading to a sudden segmentation fault exists in Envoy's ext_authz HTTP filter when processing per-route authorization overrides concurrently with rapid downstream client disconnects. During standard request lifecycles, Envoy instantiates the ext_authz filter with a foundational authorization client object (client_). If a matched route dictates a dynamic per-route HTTP or gRPC authorization service override, the filter generates a localized client. In the vulnerable implementation, this transient client aggressively overwrote the default client_ unique pointer by executing client_ = std::move(per_route_client). When a client rapidly establishes and subsequently tears down a stream (such as rapidly refreshing a protected WebSocket endpoint), the downstream triggers the ConnectionManagerImpl::doDeferredStreamDestroy() -> ActiveStream::onResetStream() lifecycle. Envoy immediately sequences Filter::onDestroy() in an attempt to securely abort dispatched asynchronous authorization check transactions via client_->cancel(). By destructing the default client abruptly during initiateCall, a memory lifecycle misalignment occurs within the async client manager. The stream teardown fails to reliably track and cancel the dynamically bound asynchronous authorization tasks, orchestrating a sequence where a late asynchronous callback from the network evaluates against a heavily destroyed ActiveStream validation span, generating a UAF process crash. This vulnerability is fixed in 1.36.9, 1.37.5, and 1.38.3.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-27 02:54 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.38.0, < 1.38.3
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CVE-2026-47692 (GCVE-0-2026-47692)
Vulnerability from cvelistv5 – Published: 2026-06-26 17:59 – Updated: 2026-06-26 19:07
VLAI
EPSS
VEX
Title
Envoy: PROXY Protocol v2 header generator emits "skipped" TLVs, causing 65 KB attacker-controlled spillover into the upstream application stream
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in the header. This can result in smuggled bytes on the upstream request. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 19:07 UTC
CWE
- CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
>= 1.38.0, < 1.38.3
Affected: >= 1.37.0, < 1.37.5 Affected: >= 1.36.0, < 1.36.9 Affected: >= 1.34.0, < 1.35.13 |
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CVE-2026-47207 (GCVE-0-2026-47207)
Vulnerability from cvelistv5 – Published: 2026-06-26 17:52 – Updated: 2026-06-26 18:30
VLAI
EPSS
VEX
Title
Envoy crashes if multiple unexpected ext_proc responses are packed into one gRPC message
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. This can occur when the first response in the batch causes the gRPC stream object to be destroyed, leading to a use-after-free error when Envoy attempts to process subsequent responses in the same gRPC message. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 18:29 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
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|---|---|---|---|
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Affected:
>= 1.38.0, < 1.38.3
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CVE-2026-48706 (GCVE-0-2026-48706)
Vulnerability from cvelistv5 – Published: 2026-06-26 17:38 – Updated: 2026-06-26 19:05
VLAI
EPSS
VEX
Title
Envoy Heap Buffer Overflow in TcpStatsdSink
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, a vulnerability exists in Envoy's TCP StatsD sink (TcpStatsdSink), where the thread-local flusher buffer can be overflowed by exceptionally long statistic names (e.g., >16KiB). During formatting, TcpStatsdSink reserves a single contiguous memory slice of 16KiB (FLUSH_SLICE_SIZE_BYTES). If formatting a single metric exceeds the remaining capacity, the flusher initiates a buffer rotation but incorrectly continues to allocate another fixed 16KiB slice. If an attacker can trigger a statistic name longer than 16KiB—for example, by sending an HTTP or gRPC request with an extremely long request path (:path) that is recorded by the grpc_stats filter configured with stats_for_all_methods: true—the flusher will attempt to copy the metric name using memcpy operations beyond the allocated heap buffer boundaries. This leads to a heap write overflow, which can cause immediate denial-of-service (process crash) or potential remote code execution (RCE). This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 19:05 UTC
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
| URL | Tags |
|---|---|
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Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
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CVE-2026-47204 (GCVE-0-2026-47204)
Vulnerability from cvelistv5 – Published: 2026-06-26 17:37 – Updated: 2026-06-29 13:27
VLAI
EPSS
VEX
Title
Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.26.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the envoy.filters.http.grpc_stats filter crashes (null pointer dereference / segfault) when a Connect protocol request (Content-Type: application/connect+proto or application/connect+json) hits a direct_response route. A single unauthenticated HTTP request crashes the Envoy process. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 13:26 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.38.0, < 1.38.3
Affected: >= 1.37.0, < 1.37.5 Affected: >= 1.36.0, < 1.36.9 Affected: >= 1.26.0, < 1.35.13 |
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CVE-2026-47221 (GCVE-0-2026-47221)
Vulnerability from cvelistv5 – Published: 2026-06-26 17:35 – Updated: 2026-06-26 18:33
VLAI
EPSS
VEX
Title
Envoy: Null pointer deref in internal redirects
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.18.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the router filter contains a null pointer dereference vulnerability when handling HTTP 303 (See Other) internal redirects for body-less non-GET/HEAD requests. When a POST, PUT, DELETE, or PATCH request without a body is sent to a route configured with internal redirect policy that includes 303 in redirect_response_codes, and the upstream responds with HTTP 303, the redirect handling code attempts to drain a request body buffer that was never allocated. This results in a segmentation fault that crashes the entire Envoy process. When route configured with internal_redirect_policy including 303 in redirect_response_codes and upstream must return HTTP 303 response, an unauthenticated attacker can exploit this to cause complete denial of service, terminating all active connections. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 18:33 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.38.0, < 1.38.3
Affected: >= 1.37.0, < 1.37.5 Affected: >= 1.36.0, < 1.36.9 Affected: >= 1.18.0, < 1.35.13 |
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CVE-2026-48743 (GCVE-0-2026-48743)
Vulnerability from cvelistv5 – Published: 2026-06-26 17:34 – Updated: 2026-06-29 15:20
VLAI
EPSS
VEX
Title
Envoy: HTTP/3 to HTTP/1 request smuggling via headers-only request with nonzero Content-Length
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, Envoy can translate a downstream HTTP/3 request that is complete at the transport layer (HEADERS with FIN / headers-only close) but still carries a nonzero Content-Length into a complete upstream HTTP/1 request with unresolved body debt. In an HTTP/1 upstream deployment where the origin replies before reading the declared body and keeps the connection reusable, the beginning of the next Envoy-generated upstream request can be consumed as the first request's body. The remaining bytes are then parsed by the origin as a new HTTP/1 request. This was reproduced as a route-bypass/desync: direct /pwn was denied by Envoy, but the second downstream H3 stream received the response for backend-parsed GET /pwn HTTP/1.1. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 15:04 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.38.0, < 1.38.1
Affected: >= 1.37.0, < 1.37.3 Affected: >= 1.36.0, < 1.36.7 Affected: >= 1.35.0, < 1.35.11 |
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CVE-2026-48497 (GCVE-0-2026-48497)
Vulnerability from cvelistv5 – Published: 2026-06-26 17:32 – Updated: 2026-06-26 18:32
VLAI
EPSS
VEX
Title
Envoy: Abnormal process termination in DNS UDP filter
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, in cases where UDP DNS filter is configured with local resolution containing a name with the length of 255 octets or remote resolution for a name of 255 octets long can complete successfully, a query with such name will result in abnormal process termination. The abnormal process termination is triggered by an invalid runtime precondition that the query name is strictly less than 255 octets, contradicting DNS specification rfc1035#section-2.3.4 that the name can be 255 or less octets. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 18:32 UTC
CWE
- CWE-480 - Use of Incorrect Operator
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.38.0, < 1.38.1
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"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j6g2-wf95-q66q"
}
],
"source": {
"advisory": "GHSA-j6g2-wf95-q66q",
"discovery": "UNKNOWN"
},
"title": "Envoy: Abnormal process termination in DNS UDP filter"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-48497",
"datePublished": "2026-06-26T17:32:58.310Z",
"dateReserved": "2026-05-21T15:33:08.292Z",
"dateUpdated": "2026-06-26T18:32:51.626Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}