{
  "cveId": "CVE-2026-44309",
  "url": "https://patchblox.com/security/cve/CVE-2026-44309",
  "summary": "CVE-2026-44309 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-44309, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "gitsign: Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity",
  "description": "Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. Prior to 0.16.0, gitsign verify and gitsign verify-tag re-encode commit/tag objects through go-git\u0027s EncodeWithoutSignature before checking the signature, instead of verifying against the raw git object bytes. For malformed objects with duplicate tree headers, git-core and go-git parse different trees: git-core uses the first, go-git uses the second. A signature crafted over the go-git-normalized form (second tree) passes gitsign verify while git-core resolves the commit to a completely different tree. This breaks the invariant that a verified signature, the commit semantics git-core presents to users, and the object hash logged in Rekor all refer to the same content. This vulnerability is fixed in 0.16.0.",
  "published": "2026-05-15T17:16:47Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
  "epss": 0.0014,
  "epssPercentile": 0.03353,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "gitsign",
      "release": "Debian 14",
      "fixedVersion": "0.16.0-1",
      "fix": "DEBIAN-CVE-2026-44309",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-44309",
      "released": "2026-05-15T17:16:47Z"
    },
    {
      "platform": "linux",
      "product": "govulncheck-vulndb",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.0.20260723T184607-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21483-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21483-1",
      "released": "2026-07-30T09:09:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}