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Vulnerabilities

Vulnerability · CVE-2023-22742

git2-rs fails to verify SSH keys by default

Published Jan 20, 2023 · catalog updated Oct 14, 2026 · git2-rs fails to verify

Check if you run it

No confirmed exploitation is on record for CVE-2023-22742. EPSS is 0.58%. Act only if a listed version of git2-rs fails to verify is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (git2-rs fails to verify).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.58%
Remediation
Advisory link
Affected products
crates.io git2 · crates.io libgit2-sys

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)

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • crates.io git20 → 0.16.1
  • crates.io libgit2-sys0 → 0.13.5
  • crates.io libgit2-sys0.14.0 → 0.14.2

How to fix CVE-2023-22742

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-22742. EPSS is 0.58%. Act only if a listed version of git2-rs fails to verify is installed.

Which versions are affected?

Compare what you have installed with 0 → 0.16.1, 0 → 0.13.5, 0.14.0 → 0.14.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.58%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. 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

  2. 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

  3. Nov 8, 2023 · GitHub Advisory Database

    Fix available

    libgit2-sys fixed in 0.14.2

  4. Nov 8, 2023 · GitHub Advisory Database

    Fix available

    libgit2-sys fixed in 0.13.5

  5. Nov 8, 2023 · GitHub Advisory Database

    Fix available

    git2 fixed in 0.16.1

  6. 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

  7. 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

Sources

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.