CVE-2023-22742
git2-rs fails to verify SSH keys by default
Published Jan 20, 2023 · updated Oct 14, 2026
The git2 and libgit2-sys crates are Rust wrappers around the [libgit2](https://libgit2.org/) C library. It was discovered that libgit2 1.5.0 and below did not verify SSH host keys when establishing an SSH connection, exposing users of the library to Man-In-the-Middle attacks. The libgit2 team assigned [CVE-2023-22742](https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq) to this vulnerability. The following versions of the libgit2-sys Rust crate have been released: * libgit2-sys 0.14.2, updating the underlying libgit2 C library to version 1.5.1. * libgit2-sys 0.13.5, updating the underlying libgit2 C library to version 1.4.5. A new git2 crate version has also been released, 0.16.1. This version only bumps its libgit2-sys dependency to ensure no vulnerable libgit2-sys versions are used, but contains no code changes: if you update the libgit2-sys version there is no need to also update the git2 crate version. [You can learn more about this vulnerability in libgit2's advisory](https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq)
Timeline
Detection, updates, and resolution for this record.
Jan 20, 2023 · GitHub Advisory Database
Detected
The git2 and libgit2-sys crates are Rust wrappers around the [libgit2](https://libgit2.org/) C library. It was discovered that libgit2 1.5.0 and below did not verify SSH host keys when establishing an SSH connection, exposing users of the library to Man-In-the-Middle attacks. The libgit2 team assigned [CVE-2023-22742](https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq) to t
Nov 8, 2023 · GitHub Advisory Database
Fix available
libgit2-sys fixed in 0.14.2; libgit2-sys fixed in 0.13.5; git2 fixed in 0.16.1
Nov 8, 2023 · GitHub Advisory Database
Fix available
libgit2-sys fixed in 0.14.2
Nov 8, 2023 · GitHub Advisory Database
Fix available
libgit2-sys fixed in 0.13.5
Nov 8, 2023 · GitHub Advisory Database
Fix available
git2 fixed in 0.16.1
Nov 8, 2023 · GitHub Advisory Database
Updated
The git2 and libgit2-sys crates are Rust wrappers around the [libgit2](https://libgit2.org/) C library. It was discovered that libgit2 1.5.0 and below did not verify SSH host keys when establishing an SSH connection, exposing users of the library to Man-In-the-Middle attacks. The libgit2 team assigned [CVE-2023-22742](https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq) to t
Oct 14, 2026 · GitHub Advisory Database
Updated
The git2 and libgit2-sys crates are Rust wrappers around the [libgit2](https://libgit2.org/) C library. It was discovered that libgit2 1.5.0 and below did not verify SSH host keys when establishing an SSH connection, exposing users of the library to Man-In-the-Middle attacks. The libgit2 team assigned [CVE-2023-22742](https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq) to t
Affected
- crates.io git20 → 0.16.1
- crates.io libgit2-sys0 → 0.13.5
- crates.io libgit2-sys0.14.0 → 0.14.2
Sources
- CVE.orgCVE-2023-22742
Official CVE identifier
cve.org - FIRST EPSSCVE-2023-22742
30-day exploitation probability 0.6%
first.org - GitHub Advisory DatabaseGHSA-m4ch-rfv5-x5g3
GitHub Advisory Database record mirrored by OSV.
github.com - OSV.devGHSA-m4ch-rfv5-x5g3
git2-rs fails to verify SSH keys by default
osv.dev