OS Command Injection in GitPython - CVE-2026-42215
Published: April 27, 2026 / Updated: May 11, 2026
Vulnerability identifier: #VU128120
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-42215
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: gitpython-developers
Affected software:
GitPython
GitPython
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to command injection in Repo.clone_from(), Remote.fetch(), Remote.pull(), and Remote.push() when processing attacker-controlled kwargs that are normalized into unsafe Git options. A remote user can supply crafted upload_pack or receive_pack values to execute arbitrary code.
The issue occurs because underscore-form kwargs bypass the unsafe-option check before being converted into dangerous command-line flags, and it does not require a malicious repository.
How to mitigate CVE-2026-42215
Install security update from vendor's website.