SB2026100129 - Incomplete List of Disallowed Inputs in argv-parser

Description

This security bulletin contains information about 1 vulnerability.

1) Incomplete List of Disallowed Inputs (CVE-ID: CVE-2026-102829)

CWE-ID: CWE-184 - Incomplete List of Disallowed Inputs

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

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.

Remediation

Install update from vendor's website.

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