CVE-2026-73624: GitPython before 3.1.54 Arbitrary File Overwrite via diff

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-13 · updated 2026-10-24
Weakness: CWE-88

Description

GitPython versions before 3.1.54 contain an arbitrary file overwrite vulnerability in the Diffable.diff method that fails to validate git options passed through kwargs. Attackers can supply the --output argument via the other parameter or output kwarg to write patch content to attacker-chosen file paths at process privilege level.

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-fjr4-x663-mwxc
https://www.vulncheck.com/advisories/gitpython-before-arbitrary-file-overwrite-via-diff
https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-fjr4-x663-mwxc

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