{"id":"CVE-2026-25934","aliases":["GHSA-37cx-329c-33x3","GO-2026-4473"],"url":"https://o3.security/vulnerability/CVE-2026-25934","summary":"go-git improperly verifies data integrity values for .idx and .pack files","details":"go-git is a highly extensible git implementation library written in pure Go. Prior to 5.16.5, a vulnerability was discovered in go-git whereby data integrity values for .pack and .idx files were not properly verified. This resulted in go-git potentially consuming corrupted files, which would likely result in unexpected errors such as object not found. For context, clients fetch packfiles from upstream Git servers. Those files contain a checksum of their contents, so that clients can perform integrity checks before consuming it. The pack indexes (.idx) are generated locally by go-git, or the git cli, when new .pack files are received and processed. The integrity checks for both files were not being verified correctly. This vulnerability is fixed in 5.16.5.","published":"2026-02-09T22:13:41.974Z","modified":"2026-09-08T12:38:51.441062361Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/go-git/go-git/v5","fixedVersion":"5.16.5"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/go-git/go-git/releases/tag/v5.16.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25934.json"},{"type":"ADVISORY","url":"https://github.com/go-git/go-git/security/advisories/GHSA-37cx-329c-33x3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25934"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-08T12:38:51.441062361Z"}}