CVE-2026-25722: Claude Code Vulnerable to Command Injection via Directory Change Bypasses Write Protection
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.
What it is
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!
How to check
- Affected: @anthropic-ai/claude-code (npm) < 2.0.57.
- Compare your installed version with the range above (command below).
How to fix
- Upgrade @anthropic-ai/claude-code to 2.0.57 or later.
npm ls @anthropic-ai/claude-code -g # or: claude --versionSources
- highCVE-2026-86063: Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
- highCVE-2026-55607: Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution
- highCVE-2026-40068: Claude Code: Trust Dialog Bypass via Git Worktree Spoofing Allows Arbitrary Code Execution
- highCVE-2026-39861: Claude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside Workspace