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  4. CVE 2023 22742 git2 rs fails to verify ssh keys by default
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Back to active CVEs
Medium · CVSS 6.8CVE-2023-22742GHSA-8643-3WH5-RMJQ

git2-rs fails to verify SSH keys by defaultCVE-2023-22742

Answer in brief

CVE-2023-22742 records a Medium severity (CVSS 6.8) vulnerability in git2-rs fails to verify SSH keys by default. The current sources do not mark it as known exploited. The current feed maps git2 (crates.io), libgit2-sys (crates.io), libgit2-sys (crates.io), libgit2-sys (crates.io). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jan 20, 2023Updated Oct 14, 2026Source checked Oct 15, 2026First seen by HOL Oct 12, 2026Material review Oct 14, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
OSV
Source checked
Oct 15, 2026
References
7 linked sources
Open source record

Key facts

Risk
Medium · CVSS 6.8
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps git2 (crates.io), libgit2-sys (crates.io), libgit2-sys (crates.io), libgit2-sys (crates.io). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
git2crates.io>=0 <0.16.10.16.1
libgit2-syscrates.io>=0.0.0-0 <0.13.5 >=0.14.0 <0.14.20.13.5, 0.14.2
libgit2-syscrates.io>=0.14.0 <0.14.20.14.2
libgit2-syscrates.io>=0 <0.13.50.13.5

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for git2, libgit2-sys, libgit2-sys.
  2. 2Review the reported fix. Update git2 to 0.16.1; libgit2-sys to 0.13.5; libgit2-sys to 0.14.2; libgit2-sys to 0.13.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jan 20, 2023

    Evidence: source:osv:source_dates:source-dates:record

  2. Source modified

    Oct 14, 2026

    Evidence: source:osv:source_dates:source-dates:record

  3. First seen by HOL

    Oct 12, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
  • Source referencerustsec.org
  • Source referencecrates.io
Upstream source description

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)

Quoted source text, attributed separately from HOL analysis.