ubuntu-cve-2026-45022
Vulnerability from osv_ubuntu
Published
2026-05-27 15:16
Modified
2026-07-02 16:14
Summary
Details

go-git is an extensible git implementation library written in pure Go. Prior to 5.19.0 and 6.0.0-alpha.3, go-git may parse malformed Git objects in a way that differs from upstream Git. When commit or tag objects contain ambiguous or malformed headers, go-git’s decoded representation may expose values differently from how Git itself would interpret or reject the same object. Additionally, go-git’s commit signing and verification logic operates over commit data reconstructed from go-git’s parsed representation rather than the original raw object bytes. As a result, go-git may sign or verify a commit payload that is not byte-for-byte equivalent to the object stored in the repository. This can cause a signature to appear valid for a commit whose displayed or effective metadata differs from the object that was intended to be signed. This vulnerability is fixed in 5.19.0 and 6.0.0-alpha.3.

Severity
7.0 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "go-git",
            "binary_version": "5.4.2-3ubuntu0.1~esm2"
          },
          {
            "binary_name": "golang-github-go-git-go-git-dev",
            "binary_version": "5.4.2-3ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "golang-github-go-git-go-git",
        "purl": "pkg:deb/ubuntu/golang-github-go-git-go-git@5.4.2-3ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.4.2-3",
        "5.4.2-3ubuntu0.1~esm1",
        "5.4.2-3ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "go-git",
            "binary_version": "5.4.2-4ubuntu0.24.04.3+esm3"
          },
          {
            "binary_name": "golang-github-go-git-go-git-dev",
            "binary_version": "5.4.2-4ubuntu0.24.04.3+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "golang-github-go-git-go-git",
        "purl": "pkg:deb/ubuntu/golang-github-go-git-go-git@5.4.2-4ubuntu0.24.04.3+esm3?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.4.2-3build1",
        "5.4.2-4",
        "5.4.2-4ubuntu0.24.04.1",
        "5.4.2-4ubuntu0.24.04.2",
        "5.4.2-4ubuntu0.24.04.2+esm1",
        "5.4.2-4ubuntu0.24.04.3",
        "5.4.2-4ubuntu0.24.04.3+esm1",
        "5.4.2-4ubuntu0.24.04.3+esm2",
        "5.4.2-4ubuntu0.24.04.3+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "go-git",
            "binary_version": "5.14.0-1"
          },
          {
            "binary_name": "golang-github-go-git-go-git-dev",
            "binary_version": "5.14.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "golang-github-go-git-go-git",
        "purl": "pkg:deb/ubuntu/golang-github-go-git-go-git@5.14.0-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.14.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "go-git",
            "binary_version": "5.16.2-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "golang-github-go-git-go-git-dev",
            "binary_version": "5.16.2-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "golang-github-go-git-go-git",
        "purl": "pkg:deb/ubuntu/golang-github-go-git-go-git@5.16.2-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.14.0-1",
        "5.16.2-1",
        "5.16.2-1ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "go-git is an extensible git implementation library written in pure Go. Prior to 5.19.0 and 6.0.0-alpha.3, go-git may parse malformed Git objects in a way that differs from upstream Git. When commit or tag objects contain ambiguous or malformed headers, go-git\u2019s decoded representation may expose values differently from how Git itself would interpret or reject the same object. Additionally, go-git\u2019s commit signing and verification logic operates over commit data reconstructed from go-git\u2019s parsed representation rather than the original raw object bytes. As a result, go-git may sign or verify a commit payload that is not byte-for-byte equivalent to the object stored in the repository. This can cause a signature to appear valid for a commit whose displayed or effective metadata differs from the object that was intended to be signed. This vulnerability is fixed in 5.19.0 and 6.0.0-alpha.3.",
  "id": "UBUNTU-CVE-2026-45022",
  "modified": "2026-07-02T16:14:46Z",
  "published": "2026-05-27T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-45022"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45022"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/go-git/go-git/security/advisories/GHSA-389r-gv7p-r3rp"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-45022"
  ]
}



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