CVE-2026-73620: GitPython before 3.1.57 Arbitrary File Overwrite and Read

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-22

Description

GitPython before 3.1.57 fails to guard git option forwarding in IndexFile.checkout() and TagReference.create(), allowing attackers to pass unsafe options via kwargs. Attackers can use --prefix to overwrite arbitrary files with repository content or -F to read arbitrary files returned in-band.

Affected products

gitpython-developers GitPython: before 3.1.57 — fixed in 3.1.57

How to fix

Upgrade to a fixed version: gitpython-developers GitPython 3.1.57. Check the vendor advisory for mitigations.

References

https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-3f7w-8rr8-f37f
https://www.vulncheck.com/advisories/gitpython-before-arbitrary-file-overwrite-and-read

Get alerted when CVE-2026-73620 or the next vulnerability affects your stack