Arbitrary Commands via Git Option Manipulation in gitjs < 3.32 (unsafe Git CLI)
CVE-2026-28291 Published on April 13, 2026

simple-git has Command Execution via Option-Parsing Bypass
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.

NVD

Vulnerability Analysis

CVE-2026-28291 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-28291. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Shell injection Vulnerability?

The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

CVE-2026-28291 has been classified to as a Shell injection vulnerability or weakness.


Products Associated with CVE-2026-28291

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Red Hat Build Keycloak
 
Red Hat Jboss Enterprise Bpms Platform
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Jboss Enterprise Application Platform
 
Red Hat Jbosseapxp
 

Affected Versions

steveukx git-js: Red Hat Build of Keycloak: Red Hat Process Automation 7: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat JBoss Enterprise Application Platform 8: Red Hat JBoss Enterprise Application Platform Expansion Pack:

Exploit Probability

EPSS
0.64%
Percentile
45.71%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.