CVE-2026-29181 (GCVE-0-2026-29181)

Vulnerability from cvelistv5 – Published: 2026-04-07 20:29 – Updated: 2026-09-17 12:04
VLAI
Title
OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-08 15:36 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version
open-telemetry opentelemetry-go Affected: >= 1.36.0, < 1.41.0
Create a notification for this product.
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 Unaffected: 1788348594 , < * (rpm)
    cpe:/a:redhat:cert_manager:1.19::el9
Create a notification for this product.
Red Hat Cluster Observability Operator 1.5.0 Unaffected: 1787593637 , < * (rpm)
    cpe:/a:redhat:cluster_observability_operator:1.5::el9
Create a notification for this product.
Red Hat Logging Subsystem for Red Hat OpenShift 6.6 Unaffected: 1788439505 , < * (rpm)
    cpe:/a:redhat:logging:6.6::el9
Create a notification for this product.
Red Hat multicluster engine for Kubernetes 2.11 Unaffected: 1780917881 , < * (rpm)
    cpe:/a:redhat:multicluster_engine:2.11::el9
Create a notification for this product.
Red Hat multicluster engine for Kubernetes 2.8 Unaffected: 1784738758 , < * (rpm)
    cpe:/a:redhat:multicluster_engine:2.8::el9
Create a notification for this product.
Red Hat cert-manager Operator for Red Hat OpenShift     cpe:/a:redhat:cert_manager:1
Create a notification for this product.
Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2     cpe:/a:redhat:acm:2
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-29181",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-08T15:36:53.783712Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-08T15:37:02.444Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "collectionURL": "https://catalog.redhat.com/software/containers/",
            "cpes": [
              "cpe:/a:redhat:cert_manager:1.19::el9"
            ],
            "defaultStatus": "affected",
            "packageName": "cert-manager/cert-manager-istio-csr-rhel9",
            "product": "Cert Manager support for Red Hat OpenShift release 1.19",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1788348594",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://catalog.redhat.com/software/containers/",
            "cpes": [
              "cpe:/a:redhat:cluster_observability_operator:1.5::el9"
            ],
            "defaultStatus": "affected",
            "packageName": "cluster-observability-operator/cluster-observability-rhel9-operator",
            "product": "Cluster Observability Operator 1.5.0",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1787593637",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://catalog.redhat.com/software/containers/",
            "cpes": [
              "cpe:/a:redhat:logging:6.6::el9"
            ],
            "defaultStatus": "affected",
            "packageName": "openshift-logging/cluster-logging-rhel9-operator",
            "product": "Logging Subsystem for Red Hat OpenShift 6.6",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1788439505",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://catalog.redhat.com/software/containers/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine:2.11::el9"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/hypershift-addon-rhel9-operator",
            "product": "multicluster engine for Kubernetes 2.11",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1780917881",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://catalog.redhat.com/software/containers/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine:2.8::el9"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/hypershift-addon-rhel9-operator",
            "product": "multicluster engine for Kubernetes 2.8",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1784738758",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:cert_manager:1"
            ],
            "defaultStatus": "affected",
            "packageName": "cert-manager/jetstack-cert-manager-rhel9",
            "product": "cert-manager Operator for Red Hat OpenShift",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/assisted-installer-agent-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/assisted-service-9-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/hypershift-rhel9-operator",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/managedcluster-import-controller-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/mce-capi-webhook-config-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/multicloud-manager-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/placement-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/registration-operator-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/registration-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "packageName": "multicluster-engine/work-rhel9",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:acm:2"
            ],
            "defaultStatus": "unaffected",
            "packageName": "rhacm2/acm-must-gather-rhel9",
            "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:acm:2"
            ],
            "defaultStatus": "unknown",
            "packageName": "rhacm2/multicluster-observability-rhel9-operator",
            "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:acm:2"
            ],
            "defaultStatus": "affected",
            "packageName": "rhacm2/volsync-rhel9",
            "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-04-07T20:29:13.933Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in OpenTelemetry-Go, the Go implementation of OpenTelemetry. A remote attacker can exploit this vulnerability by sending multiple \u0027baggage\u0027 header lines. The system\u0027s independent parsing and aggregation of each header field-value across multiple values can lead to amplified CPU and memory allocations, resulting in a Denial of Service (DoS)."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-17T12:04:31.510Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-29181"
          },
          {
            "name": "RHBZ#2456252",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456252"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29181.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:63140"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:61314"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:66521"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:25271"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:47735"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:63140: Cert Manager support for Red Hat OpenShift release 1.19"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:61314: Cluster Observability Operator 1.5.0"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:66521: Logging Subsystem for Red Hat OpenShift 6.6"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:25271: multicluster engine for Kubernetes 2.11"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:47735: multicluster engine for Kubernetes 2.8"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-04-07T21:01:21.484Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-04-07T20:29:13.933Z",
            "value": "Made public."
          }
        ],
        "title": "github.com/open-telemetry/opentelemetry-go: OpenTelemetry-Go: Denial of Service via crafted multi-value baggage headers",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "opentelemetry-go",
          "vendor": "open-telemetry",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.36.0, \u003c 1.41.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-07T20:29:13.933Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475"
        }
      ],
      "source": {
        "advisory": "GHSA-mh2q-q3fh-2475",
        "discovery": "UNKNOWN"
      },
      "title": "OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-29181",
    "datePublished": "2026-04-07T20:29:13.933Z",
    "dateReserved": "2026-03-04T14:44:00.713Z",
    "dateUpdated": "2026-09-17T12:04:31.510Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-29181",
      "date": "2026-10-03",
      "epss": "0.00873",
      "percentile": "0.57504"
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-10-02T11:55:54+00:00",
      "cve": "CVE-2026-29181",
      "id": "CVE-2026-29181",
      "initial_release_date": "2026-04-07T20:29:13.933000+00:00",
      "product_status:fixed": "36",
      "product_status:known_affected": "11",
      "product_status:known_not_affected": "413",
      "product_status:under_investigation": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "github.com/open-telemetry/opentelemetry-go: OpenTelemetry-Go: Denial of Service via crafted multi-value baggage headers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29181.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "affected": [
              {
                "collectionURL": "https://catalog.redhat.com/software/containers/",
                "cpes": [
                  "cpe:/a:redhat:cert_manager:1.19::el9"
                ],
                "defaultStatus": "affected",
                "packageName": "cert-manager/cert-manager-istio-csr-rhel9",
                "product": "Cert Manager support for Red Hat OpenShift release 1.19",
                "vendor": "Red Hat",
                "versions": [
                  {
                    "lessThan": "*",
                    "status": "unaffected",
                    "version": "1788348594",
                    "versionType": "rpm"
                  }
                ]
              },
              {
                "collectionURL": "https://catalog.redhat.com/software/containers/",
                "cpes": [
                  "cpe:/a:redhat:cluster_observability_operator:1.5::el9"
                ],
                "defaultStatus": "affected",
                "packageName": "cluster-observability-operator/cluster-observability-rhel9-operator",
                "product": "Cluster Observability Operator 1.5.0",
                "vendor": "Red Hat",
                "versions": [
                  {
                    "lessThan": "*",
                    "status": "unaffected",
                    "version": "1787593637",
                    "versionType": "rpm"
                  }
                ]
              },
              {
                "collectionURL": "https://catalog.redhat.com/software/containers/",
                "cpes": [
                  "cpe:/a:redhat:logging:6.6::el9"
                ],
                "defaultStatus": "affected",
                "packageName": "openshift-logging/cluster-logging-rhel9-operator",
                "product": "Logging Subsystem for Red Hat OpenShift 6.6",
                "vendor": "Red Hat",
                "versions": [
                  {
                    "lessThan": "*",
                    "status": "unaffected",
                    "version": "1788439505",
                    "versionType": "rpm"
                  }
                ]
              },
              {
                "collectionURL": "https://catalog.redhat.com/software/containers/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine:2.11::el9"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/hypershift-addon-rhel9-operator",
                "product": "multicluster engine for Kubernetes 2.11",
                "vendor": "Red Hat",
                "versions": [
                  {
                    "lessThan": "*",
                    "status": "unaffected",
                    "version": "1780917881",
                    "versionType": "rpm"
                  }
                ]
              },
              {
                "collectionURL": "https://catalog.redhat.com/software/containers/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine:2.8::el9"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/hypershift-addon-rhel9-operator",
                "product": "multicluster engine for Kubernetes 2.8",
                "vendor": "Red Hat",
                "versions": [
                  {
                    "lessThan": "*",
                    "status": "unaffected",
                    "version": "1784738758",
                    "versionType": "rpm"
                  }
                ]
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:cert_manager:1"
                ],
                "defaultStatus": "affected",
                "packageName": "cert-manager/jetstack-cert-manager-rhel9",
                "product": "cert-manager Operator for Red Hat OpenShift",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/assisted-installer-agent-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/assisted-service-9-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/hypershift-rhel9-operator",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/managedcluster-import-controller-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/mce-capi-webhook-config-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/multicloud-manager-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/placement-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/registration-operator-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/registration-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:multicluster_engine"
                ],
                "defaultStatus": "affected",
                "packageName": "multicluster-engine/work-rhel9",
                "product": "Multicluster Engine for Kubernetes",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:acm:2"
                ],
                "defaultStatus": "unaffected",
                "packageName": "rhacm2/acm-must-gather-rhel9",
                "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:acm:2"
                ],
                "defaultStatus": "unknown",
                "packageName": "rhacm2/multicluster-observability-rhel9-operator",
                "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
                "vendor": "Red Hat"
              },
              {
                "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                "cpes": [
                  "cpe:/a:redhat:acm:2"
                ],
                "defaultStatus": "affected",
                "packageName": "rhacm2/volsync-rhel9",
                "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
                "vendor": "Red Hat"
              }
            ],
            "datePublic": "2026-04-07T20:29:13.933Z",
            "descriptions": [
              {
                "lang": "en",
                "value": "A flaw was found in OpenTelemetry-Go, the Go implementation of OpenTelemetry. A remote attacker can exploit this vulnerability by sending multiple \u0027baggage\u0027 header lines. The system\u0027s independent parsing and aggregation of each header field-value across multiple values can lead to amplified CPU and memory allocations, resulting in a Denial of Service (DoS)."
              }
            ],
            "metrics": [
              {
                "other": {
                  "content": {
                    "namespace": "https://access.redhat.com/security/updates/classification/",
                    "value": "Important"
                  },
                  "type": "Red Hat severity rating"
                }
              },
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "HIGH",
                  "baseScore": 7.5,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
                },
                "format": "CVSS"
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-770",
                    "description": "Allocation of Resources Without Limits or Throttling",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-09-11T12:09:00.991Z",
              "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
              "shortName": "redhat-SADP"
            },
            "references": [
              {
                "tags": [
                  "vdb-entry",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/security/cve/CVE-2026-29181"
              },
              {
                "name": "RHBZ#2456252",
                "tags": [
                  "issue-tracking",
                  "x_refsource_REDHAT"
                ],
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456252"
              },
              {
                "tags": [
                  "x_sadp-csaf-vex"
                ],
                "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29181.json"
              },
              {
                "tags": [
                  "vendor-advisory",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/errata/RHSA-2026:63140"
              },
              {
                "tags": [
                  "vendor-advisory",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/errata/RHSA-2026:61314"
              },
              {
                "tags": [
                  "vendor-advisory",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/errata/RHSA-2026:66521"
              },
              {
                "tags": [
                  "vendor-advisory",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/errata/RHSA-2026:25271"
              },
              {
                "tags": [
                  "vendor-advisory",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/errata/RHSA-2026:47735"
              }
            ],
            "solutions": [
              {
                "lang": "en",
                "value": "RHSA-2026:63140: Cert Manager support for Red Hat OpenShift release 1.19"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:61314: Cluster Observability Operator 1.5.0"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:66521: Logging Subsystem for Red Hat OpenShift 6.6"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:25271: multicluster engine for Kubernetes 2.11"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:47735: multicluster engine for Kubernetes 2.8"
              }
            ],
            "timeline": [
              {
                "lang": "en",
                "time": "2026-04-07T21:01:21.484Z",
                "value": "Reported to Red Hat."
              },
              {
                "lang": "en",
                "time": "2026-04-07T20:29:13.933Z",
                "value": "Made public."
              }
            ],
            "title": "github.com/open-telemetry/opentelemetry-go: OpenTelemetry-Go: Denial of Service via crafted multi-value baggage headers",
            "x_adpType": "supplier",
            "x_generator": {
              "engine": "sadp-cli 1.0.0"
            }
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-29181",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-04-08T15:36:53.783712Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-04-08T15:36:58.862Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "opentelemetry-go",
              "vendor": "open-telemetry",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003e= 1.36.0, \u003c 1.41.0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-770",
                  "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-04-07T20:29:13.933Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475"
            }
          ],
          "source": {
            "advisory": "GHSA-mh2q-q3fh-2475",
            "discovery": "UNKNOWN"
          },
          "title": "OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-29181",
        "datePublished": "2026-04-07T20:29:13.933Z",
        "dateReserved": "2026-03-04T14:44:00.713Z",
        "dateUpdated": "2026-09-11T12:09:00.991Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.