{"id":"GHSA-w5pp-99ch-qj29","summary":"go-git: Malformed Git object data may cause panics or resource exhaustion","details":"### Impact\nSeveral denial-of-service issues were identified in `go-git` when parsing maliciously crafted Git repository data.\n\nAn attacker may craft a malicious `.pack`, `.idx` or loose objects that causes an application using an affected version of `go-git` to panic or consume excessive resources.\n\nThis can lead to denial of service in applications that use `go-git` to clone, fetch, open, or otherwise process untrusted repositories or Git object data.\n\nExploitation requires the ability to alter read-only files such as `.pack` or `.idx` from the local repository's `.git/objects/pack/` directory. Alternatively, the user would need to be interacting with a malicious remote server, which is not recommended and exposes users to a broader class of security risks beyond this issue.\n\n### Patches\nUsers should upgrade to a patched version in order to mitigate this vulnerability. Versions prior to `v5` are likely to be affected, users are recommended to upgrade to a supported `go-git` version.\n\n### Credits\ngo-git thanks @kodareef5, @AyushParkara and @N0zoM1z0 for reporting this in four separate reports. 🙇","aliases":["GO-2026-5693"],"modified":"2026-09-10T03:51:07.219021451Z","published":"2026-05-29T19:43:27Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-05-29T19:43:27Z","nvd_published_at":null,"cwe_ids":["CWE-400"]},"references":[{"type":"WEB","url":"https://github.com/go-git/go-git/security/advisories/GHSA-w5pp-99ch-qj29"},{"type":"PACKAGE","url":"https://github.com/go-git/go-git"}],"affected":[{"package":{"name":"github.com/go-git/go-git/v5","ecosystem":"Go","purl":"pkg:golang/github.com/go-git/go-git/v5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.19.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 5.19.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-w5pp-99ch-qj29/GHSA-w5pp-99ch-qj29.json"}},{"package":{"name":"github.com/go-git/go-git/v6","ecosystem":"Go","purl":"pkg:golang/github.com/go-git/go-git/v6"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"6.0.0-alpha.4"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 6.0.0-alpha.3","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-w5pp-99ch-qj29/GHSA-w5pp-99ch-qj29.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}