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2.5 KiB
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2.5 KiB
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{"schema_version":"1.9.2","id":"GHSA-gm2x-2g9h-ccm8","published":"2026-03-30T17:05:23Z","modified":"2026-11-02T23:15:03.598995490Z","aliases":["CVE-2026-33762","GO-2026-4909"],"summary":"go-git missing validation decoding Index v4 files leads to panic","details":"### Impact\n\n`go-git`’s index decoder for format version 4 fails to validate the path name prefix length before applying it to the previously decoded path name. A maliciously crafted index file can trigger an out-of-bounds slice operation, resulting in a runtime panic during normal index parsing.\n\nThis issue only affects Git index format version 4. Earlier formats (`go-git` supports only `v2` and `v3`) are not vulnerable to this issue.\n\nAn attacker able to supply a crafted `.git/index` file can cause applications using go-git to panic while reading the index. If the application does not recover from panics, this results in process termination, leading to a denial-of-service (DoS) condition.\n\nExploitation requires the ability to modify or inject a Git index file within the local repository in disk. This typically implies write access to the `.git` directory.\n\n### Patches\n\nUsers should upgrade to `v5.17.1`, or the latest `v6` [pseudo-version](https://go.dev/ref/mod#pseudo-versions), in order to mitigate this vulnerability.\n\n### Credit\n\ngo-git maintainers thank @kq5y for finding and reporting this issue privately to the `go-git` project.","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":"5.17.1"}]}],"database_specific":{"last_known_affected_version_range":"<= 5.17.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-gm2x-2g9h-ccm8/GHSA-gm2x-2g9h-ccm8.json"}}],"references":[{"type":"WEB","url":"https://github.com/go-git/go-git/security/advisories/GHSA-gm2x-2g9h-ccm8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33762"},{"type":"WEB","url":"https://github.com/go-git/go-git/commit/e9b65df44cb97faeba148b47523a362beaecddf9"},{"type":"PACKAGE","url":"https://github.com/go-git/go-git"},{"type":"WEB","url":"https://github.com/go-git/go-git/releases/tag/v5.17.1"}],"database_specific":{"cwe_ids":["CWE-129"],"github_reviewed":true,"github_reviewed_at":"2026-03-30T17:05:23Z","nvd_published_at":"2026-03-31T15:16:15Z","severity":"LOW"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L"}]} |