What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 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: 2026-08-01 · updated 2026-10-23
• Weakness: CWE-78

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 products

• gitpython-developers GitPython: before 3.1.50 — fixed in 3.1.50

How to fix

Upgrade to a fixed version: gitpython-developers GitPython 3.1.50. Check the vendor advisory for mitigations.

References

• https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-v396-v7q4-x2qj
• https://www.vulncheck.com/advisories/gitpython-authentication-bypass-via-joined-short-options

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