CVE-2026-54580 (GCVE-0-2026-54580)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:51 – Updated: 2026-09-24 20:55
VLAI
Title
mport index decompression can leave partial or corrupt index data after zstd failures
Summary
mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 20:37 UTC
CWE
  • CWE-354 - Improper Validation of Integrity Check Value
  • CWE-755 - Improper Handling of Exceptional Conditions
Assigner
References
Impacted products
Vendor Product Version
MidnightBSD mport Affected: < 2.7.8
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54580",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-24T20:37:31.208937Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-24T20:55:22.459Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "mport",
          "vendor": "MidnightBSD",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.7.8"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-354",
              "description": "CWE-354: Improper Validation of Integrity Check Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-755",
              "description": "CWE-755: Improper Handling of Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:51:29.785Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w"
        },
        {
          "name": "https://github.com/MidnightBSD/mport/pull/135",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/MidnightBSD/mport/pull/135"
        },
        {
          "name": "https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d"
        },
        {
          "name": "https://github.com/MidnightBSD/mport/releases/tag/2.7.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/MidnightBSD/mport/releases/tag/2.7.8"
        }
      ],
      "source": {
        "advisory": "GHSA-ffqj-j42r-747w",
        "discovery": "UNKNOWN"
      },
      "title": "mport index decompression can leave partial or corrupt index data after zstd failures"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54580",
    "datePublished": "2026-09-17T16:51:29.785Z",
    "dateReserved": "2026-06-15T19:15:27.344Z",
    "dateUpdated": "2026-09-24T20:55:22.459Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-54580",
      "date": "2026-10-03",
      "epss": "0.00261",
      "percentile": "0.16248"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-54580",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-09-24T20:37:31.208937Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-09-24T20:49:59.049Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "mport",
              "vendor": "MidnightBSD",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 2.7.8"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "baseScore": 8.3,
                "baseSeverity": "HIGH",
                "privilegesRequired": "NONE",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "LOW"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-354",
                  "description": "CWE-354: Improper Validation of Integrity Check Value",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-755",
                  "description": "CWE-755: Improper Handling of Exceptional Conditions",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-17T16:51:29.785Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w"
            },
            {
              "name": "https://github.com/MidnightBSD/mport/pull/135",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/MidnightBSD/mport/pull/135"
            },
            {
              "name": "https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d"
            },
            {
              "name": "https://github.com/MidnightBSD/mport/releases/tag/2.7.8",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/MidnightBSD/mport/releases/tag/2.7.8"
            }
          ],
          "source": {
            "advisory": "GHSA-ffqj-j42r-747w",
            "discovery": "UNKNOWN"
          },
          "title": "mport index decompression can leave partial or corrupt index data after zstd failures"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-54580",
        "datePublished": "2026-09-17T16:51:29.785Z",
        "dateReserved": "2026-06-15T19:15:27.344Z",
        "dateUpdated": "2026-09-24T20:55:22.459Z",
        "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.