Vulnerability · Published Sep 29, 2026 · Assigned by GitHub_M

CVE-2026-102826simple-git allows command execution through unblocked Git configuration includes

High 8.1

In plain English

A high-severity command injection in git-js from steveukx. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.5%top 59.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

simple-git, an interface for running git commands in any node.js application, enables applications to execute Git operations from JavaScript. Prior to 4.0.0, the default blockUnsafeOperationsPlugin does not completely reject configuration includes supplied through customArgs to git.clone(). The missing include.path classification permits Git to load an attacker-controlled configuration file, and the initial remediation does not cover includeIf.<condition>.path, allowing the same file-loading primitive through a conditional include. A loaded configuration can set an executable Git option such as core.sshCommand, which Git invokes during the clone operation with the privileges of the Node.js process. Exploitation requires the application to pass attacker-influenced custom arguments and requires an attacker-controlled file that the process can read. This issue is fixed in 4.0.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	simple-git	4.0.0	GHSA-g4wm-2vf7-vfgr

Affected products (as reported)

Vendor	Product	Versions
steveukx	git-js	< 4.0.0

Weakness: CWE-77, CWE-78 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/steveukx/git-js/security/advisories/GHSA-g4wm-2vf7-vfgr x_refsource_CONFIRM
https://github.com/steveukx/git-js/pull/1193 x_refsource_MISC
https://github.com/steveukx/git-js/commit/98864c678444d9336357c844efa4fd5a7984c0d7 x_refsource_MISC
https://github.com/steveukx/git-js/releases/tag/simple-git@4.0.0 x_refsource_MISC