CVE-2026-24053: Claude Code has a Path Restriction Bypass via ZSH Clobber which Allows Arbitrary File Writes
Due to a Bash command validation flaw in parsing ZSH clobber syntax, it was possible to bypass directory restrictions and write files outside the current working directory without user permission prompts.
What it is
Due to a Bash command validation flaw in parsing ZSH clobber syntax, it was possible to bypass directory restrictions and write files outside the current working directory without user permission prompts. Exploiting this required the user to use ZSH and the ability to add untrusted content into a Claude Code context window.
Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.
Claude Code thanks https://hackerone.com/alexbernier for reporting this issue!
How to check
- Affected: @anthropic-ai/claude-code (npm) < 2.0.74.
- Compare your installed version with the range above (command below).
How to fix
- Upgrade @anthropic-ai/claude-code to 2.0.74 or later.
npm ls @anthropic-ai/claude-code -g # or: claude --versionSources
- criticalCVE-2026-96620: Claude Agent SDK (Python) resume option lets attackers run commands
- criticalUpGuard: 16,326 Supabase databases had readable tables
- highCVE-2026-86063: Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
- highCVE-2026-103435: Claude Code could be raced into writing files outside the project