Incomplete List of Disallowed Inputs in argv-parser - CVE-2026-102829

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to an incomplete denylist in unsafe editor detection in the parseEnv environment parser when handling attacker-influenced environment variables passed to a child Git process. A remote attacker can supply a malicious VISUAL environment variable to execute arbitrary code.

Exploitation requires a Git operation that opens an editor, no higher-priority editor configuration, a TERM value other than dumb, and a runnable attacker-selected executable.

Affected software

How to mitigate CVE-2026-102829

External References

• https://github.com/steveukx/git-js/security/advisories/GHSA-v5rq-49vh-5v5c
• https://github.com/steveukx/git-js/blob/c427fbad33f1f2b11341f1cf852eedecbb106400/packages/argv-parser/src/env/parse-env.ts

Related Security Bulletins

• Incomplete List of Disallowed Inputs in argv-parser