CVE-2026-44309

תיאור (מקור, אנגלית)

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's 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.

מדדים

CVSS 3.1

5.3 (MEDIUM) מקור הציון: CNA CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-4/8/2026

CWE

CWE-295, CWE-347

קישורים

• https://github.com/sigstore/gitsign/security/advisories/GHSA-7rmh-48mx-2vwc
• https://github.com/sigstore/gitsign/security/advisories/GHSA-7rmh-48mx-2vwc