Path traversal in GitPython - CVE-2026-100689
Published: September 9, 2026 / Updated: September 28, 2026
Vulnerability identifier: #VU148454
CSH Severity: Low
CVSS v4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100689
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to create and populate directories outside the repository working tree.
The vulnerability exists due to improper limitation of a pathname to a restricted directory in the submodule update path in git/objects/submodule/base.py when processing a crafted .gitmodules path during a submodule update. A remote attacker can supply a crafted .gitmodules path to create and populate directories outside the repository working tree.
Exploitation requires application code to select a non-HEAD commit through a historical-commit submodule-update API.
Affected software
GitPython
How to mitigate CVE-2026-100689
Install security update from vendor's website.
GitPython - update to 3.1.62