SB2026041459 - OS Command Injection in Simple Git

Description

This security bulletin contains information about 1 vulnerability.

1) OS Command Injection (CVE-ID: CVE-2026-28292)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to execute arbitrary OS commands.

The vulnerability exists due to improper neutralization of special elements used in an OS command in the blockUnsafeOperationsPlugin preventProtocolOverride function when processing user-controlled git arguments. A remote attacker can pass a mixed-case or uppercase protocol.allow configuration together with a malicious ext:: URL to execute arbitrary OS commands.

Exploitation requires control over arguments passed to git operations such as customArgs.

Remediation

Install update from vendor's website.

References

• https://github.com/steveukx/git-js/security/advisories/GHSA-r275-fr43-pm7q
• https://github.com/advisories/GHSA-r275-fr43-pm7q