CVE-2026-28291

simple-git enables running native Git commands from JavaScript. Versions up to and including 3.31.1 allow execution of arbitrary commands through Git option manipulation, bypassing safety checks meant to block dangerous options like -u and --upload-pack. The flaw stems from an incomplete fix for CVE-2022-25860, as Git's flexible option parsing allows numerous character combinations (e.g., -vu, -4u, -nu) to circumvent the regular-expression-based blocklist in the unsafe operations plugin. Due to the virtually infinite number of valid option variants that Git accepts, a complete blocklist-based mitigation may be infeasible without fully emulating Git's option parsing behavior. This issue has been fixed in version 3.32.0.

The following products are affected by CVE-2026-28291 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-28291.

URL	Resource
https://github.com/steveukx/git-js/blob/789c13ebabcf18ebe0b3a0c88ebb4037dede42e3/simple-git/src/lib/plugins/block-unsafe-operations-plugin.ts#L26
https://github.com/steveukx/git-js/commit/1effd8e5012a5da05a9776512fac3e39b11f2d2d
https://github.com/steveukx/git-js/releases/tag/simple-git%403.32.0
https://github.com/steveukx/git-js/security/advisories/GHSA-jcxm-m3jx-f287
https://nvd.nist.gov/vuln/detail/CVE-2026-28291
https://www.cve.org/CVERecord?id=CVE-2022-25860
https://www.cve.org/CVERecord?id=CVE-2026-28291