CVE-2026-73623: GitPython before 3.1.54 Remote Code Execution via --template

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-13 · updated 2026-10-24
Weakness: CWE-78

Description

GitPython before 3.1.54 contains an incomplete denylist in unsafe_git_clone_options that omits --template, allowing attackers to achieve arbitrary command execution during clone operations. Attackers can supply --template pointing to a directory containing malicious post-checkout hooks that execute when git clones the repository.

Affected products

gitpython-developers GitPython: before 3.1.54 — fixed in 3.1.54

How to fix

Upgrade to a fixed version: gitpython-developers GitPython 3.1.54. Check the vendor advisory for mitigations.

References

https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-6p8h-3wgx-97gf
https://www.vulncheck.com/advisories/gitpython-before-remote-code-execution-via-template
https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-6p8h-3wgx-97gf

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