{"id":"CVE-2026-34165","aliases":["GHSA-jhf3-xxhw-2wpp","GO-2026-4910"],"url":"https://o3.security/vulnerability/CVE-2026-34165","summary":"go-git: Maliciously crafted idx file can cause asymmetric memory consumption","details":"### Impact\n\nA vulnerability has been identified in which a maliciously crafted `.idx` file can cause asymmetric memory consumption, potentially exhausting available memory and resulting in a Denial of Service (DoS) condition.\n\nExploitation requires write access to the local repository's `.git` directory, it order to create or alter existing `.idx` files. \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\nThe go-git maintainers thank @kq5y for finding and reporting this issue privately to the `go-git` project.","published":"2026-03-31T13:46:37.688Z","modified":"2026-10-28T02:30:22.149679353Z","cvss":{"score":5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H"},"epss":{"score":0.00147,"percentile":0.04191,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/go-git/go-git/v5","fixedVersion":"5.17.1"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/go-git/go-git/releases/tag/v5.17.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34165.json"},{"type":"ADVISORY","url":"https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34165"},{"type":"PACKAGE","url":"https://github.com/go-git/go-git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:22.149679353Z"}}