Incomplete List of Disallowed Inputs in Simple Git - CVE-2026-102828
Published: October 1, 2026
Vulnerability identifier: #VU153056
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-102828
CWE-ID: CWE-184
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary commands.
The vulnerability exists due to an incomplete blacklist in the blockUnsafeOperationsPlugin when processing attacker-controlled trailer command configuration. A remote attacker can supply a trailer.<token>.cmd configuration value and invoke git interpret-trailers to execute arbitrary commands.
Exploitation requires an application to pass attacker-controlled configuration or command arguments to simple-git while the default unsafe-operation plugin is active, and the invoked Git binary must support trailer command behavior.
Affected software
Simple Git
How to mitigate CVE-2026-102828
Install security update from vendor's website.
Simple Git - update to 4.0.1