{"id":"CVE-2026-45022","aliases":["GHSA-389r-gv7p-r3rp","GO-2026-5074"],"url":"https://o3.security/vulnerability/CVE-2026-45022","summary":"go-git: Improper parsing of specially crafted objects may lead to inconsistent interpretation compared to upstream Git","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.","published":"2026-05-27T14:54:47.872Z","modified":"2026-07-24T19:11:40.512327990Z","cvss":null,"epss":{"score":0.00159,"percentile":0.05551,"asOf":"2026-08-09"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/go-git/go-git/v6","fixedVersion":"6.0.0-alpha.3"},{"ecosystem":"Go","name":"github.com/go-git/go-git/v5","fixedVersion":"5.19.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45022.json"},{"type":"ADVISORY","url":"https://github.com/go-git/go-git/security/advisories/GHSA-389r-gv7p-r3rp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45022"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-24T19:11:40.512327990Z"}}