git-diff before 2.0.7 OS Command Injection via gitDiff Input Strings

Summary

git-diff before 2.0.7 contains an OS command injection vulnerability that allows attackers to execute shell commands by supplying crafted strings to the gitDiff API. Attackers who control a diffed document string can embed $(cmd) or backtick substitutions that shelljs.exec evaluates, running commands with Node.js process privileges.

Evidence

The maintainer accepted the patch submitted with the report and merged the fix.

Remediation

Upgrade git-diff to 2.0.7 or later.

References

• VulnCheck advisoryhttps://www.vulncheck.com/advisories/git-diff-before-2.0.7-os-command-injection-via-gitdiff-input-strings
• Fix pull requesthttps://github.com/danday74/git-diff/pull/16
• Vulnerable codehttps://github.com/danday74/git-diff/blob/a85a649badc4c6bba991e87e82382b7d3cdd6634/js/gitDiffReal/generateDiff/index.js#L26-L30
• CVE recordhttps://www.cve.org/CVERecord?id=CVE-2026-110634