Vulnerability · Published Aug 1, 2026 · Assigned by VulnCheck

CVE-2026-67324GitPython 3.1.50 Authentication Bypass via Joined Short Options

Critical 9.8

In plain English

A critical-severity OS command injection in GitPython from gitpython-developers. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.5%top 60.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

GitPython 3.1.50 fails to recognize joined short-option forms such as -u<value> (the short form of --upload-pack=<value>) when enforcing its default unsafe-option gate. When an application passes attacker-influenced clone options into Repo.clone_from(..., multi_options=..., allow_unsafe_options=False), an attacker can supply -u<helper> to bypass the gate that blocks --upload-pack/-u, causing Git to execute the specified helper command during clone. Fixed in 3.1.51.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	python-git	3.1.30-1+deb12u3	DEBIAN-CVE-2026-67324
Debian:13	python-git	3.1.44-1+deb13u1	DEBIAN-CVE-2026-67324
Debian:14	python-git	3.1.61-1	DEBIAN-CVE-2026-67324
PyPI	gitpython	3.1.51	GHSA-v396-v7q4-x2qj
PyPI	gitpython	3.1.51	PYSEC-2026-3947
Ubuntu:26.10	python-git	no fix listed	UBUNTU-CVE-2026-67324

Affected products (as reported)

Vendor	Product	Versions
gitpython-developers	GitPython	3.1.50 – before 3.1.51

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-v396-v7q4-x2qj) vendor-advisory
VulnCheck Advisory: GitPython 3.1.50 Authentication Bypass via Joined Short Options third-party-advisory