High severity · published Apr 13, 2026
CVE-2026-28291
simple-git has Command Execution via Option-Parsing Bypass
8.1
CVSS
0.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
git-js · steveukx
< 3.32.0 · source: vendor
SI
Simple-git · Simple-git Project
before 3.32.0 · source: NVD
RH
Red Hat Build of Keycloak · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Process Automation 7 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28291
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28291
Product
https://github.com/steveukx/git-js/blob/789c13ebabcf18ebe0b3a0c88ebb4037dede42e3/simple-git/src/lib/plugins/block-unsafe-operations-plugin.ts#L26
Patch
https://github.com/steveukx/git-js/commit/1effd8e5012a5da05a9776512fac3e39b11f2d2d
Release Notes
https://github.com/steveukx/git-js/releases/tag/simple-git%403.32.0
Exploit
https://github.com/steveukx/git-js/security/advisories/GHSA-jcxm-m3jx-f287
Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2022-25860
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-28291
More from git-js
9.8
CVE-2026-102828
simple-git unsafe-operation guard does not block trailer command configuration
9.8
CVE-2026-102827
simple-git: unsafe-operations plugin bypass via git long-option abbreviation (--receive-p/--exe) -> command execution (residual of CVE-2026-28291)
9.2
CVE-2026-102829
simple-git: `VISUAL` editor environment variable is omitted from unsafe editor detection
8.1
CVE-2026-102826
simple-git allows command execution through unblocked Git configuration includes
