AI agent vulnerability · Claude Code

CVE-2026-25722: Claude Code Vulnerable to Command Injection via Directory Change Bypasses Write Protection

highCVSS 4.0 7.7GHSA-66q4-vfjg-2qhh

Claude Code failed to properly validate directory changes when combined with write operations to protected folders. By using the cd command to navigate into sensitive directories like .claude, it was possible to bypass write protection and create or modify files without user confirmation. Reliably exploiting this required the ability to add untrusted content into a Claude Code context window.

Published Feb 6, 2026

Affected packages

@anthropic-ai/claude-code

Ecosystem: npm
Affected: < 2.0.57
Fixed in: 2.0.57
Check: npm ls @anthropic-ai/claude-code

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Claude Code failed to properly validate directory changes when combined with write operations to protected folders. By using the cd command to navigate into sensitive directories like .claude, it was possible to bypass write protection and create or modify files without user confirmation. Reliably exploiting this required the ability to add untrusted content into a Claude Code context window.

Users on standard Claude Code auto-update received this fix automatically. Users performing manual updates are advised to update to the latest version.

About Claude Code thanks hackerone.com/nil221 for reporting this issue!

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

More Claude Code vulnerabilities

All Claude Code entries