{"id":"CVE-2026-45570","aliases":["GHSA-m7cr-m3pv-hgrp","GO-2026-5496"],"url":"https://o3.security/vulnerability/CVE-2026-45570","summary":"go-git: Improper single-quote escaping in go-git SSH transport","details":"### Impact\n\n`go-git`'s SSH transport constructs the remote exec command by wrapping the repository path in single quotes without escaping single quotes embedded inside the path. This diverges from canonical Git, which shell-quotes the path through `sq_quote_buf` so that an embedded `'` becomes the `'\\''` close-escape-reopen sequence and the whole path round-trips as a single quoted argument.\n\nA repository path containing a single quote can therefore break out of the quoted region in the exec command and be appended as additional shell tokens. On SSH servers that evaluate the exec command through a shell (for example a user account whose login shell is `/bin/sh` or `/bin/bash`, or a `ForceCommand` wrapper that re-evaluates `$SSH_ORIGINAL_COMMAND`), those additional tokens execute in that account's command-execution context. SSH servers that tokenize the exec command without shell evaluation, including the canonical `git-shell` setup, are not affected.\n\nThe vulnerable behaviour is on the SSH server side, not in `go-git`: the same bytes can be produced by any SSH client. The change in `go-git` is defense-in-depth that restores parity with canonical Git's wire format and prevents `go-git` from being a vehicle for reaching shell-evaluating servers through attacker-influenced repository paths.\n\n### Patches\n\nUsers should upgrade to a patched version in order to mitigate this issue. The fix ports `sq_quote_buf` from canonical Git into `go-git`'s SSH transport so that the wire output is byte-identical to what `git` itself would send for the same input.\n\nVersions prior to `v5` are likely to be affected, users are recommended to upgrade to a supported go-git version.\n\n### Credit\n\nThanks to @N0zoM1z0 for reporting this to the `go-git` project. :bow:","published":"2026-05-27T14:59:17.441Z","modified":"2026-08-12T03:51:33.213157486Z","cvss":null,"epss":{"score":0.00365,"percentile":0.29224,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/go-git/go-git/v5","fixedVersion":"5.19.1"},{"ecosystem":"Go","name":"github.com/go-git/go-git/v6","fixedVersion":"6.0.0-alpha.4"},{"ecosystem":"Go","name":"github.com/go-git/go-git","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45570.json"},{"type":"ADVISORY","url":"https://github.com/go-git/go-git/security/advisories/GHSA-m7cr-m3pv-hgrp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45570"},{"type":"PACKAGE","url":"https://github.com/go-git/go-git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:33.213157486Z"}}