Headline
GHSA-66m2-gx93-v996: Claude Code permission deny bypass through symlink
Claude Code failed to account for symlinks when checking permission deny rules. If a user explicitly denied Claude Code access to a file and Claude Code had access to a symlink pointing to that file, it was possible for Claude Code to access the file.
Users on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version.
Thank you to https://hackerone.com/vinai for reporting this issue!
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-59829
Claude Code permission deny bypass through symlink
Low severity GitHub Reviewed Published Oct 3, 2025 in anthropics/claude-code • Updated Oct 3, 2025
Package
npm @anthropic-ai/claude-code (npm)
Affected versions
< 1.0.120
Claude Code failed to account for symlinks when checking permission deny rules. If a user explicitly denied Claude Code access to a file and Claude Code had access to a symlink pointing to that file, it was possible for Claude Code to access the file.
Users on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version.
Thank you to https://hackerone.com/vinai for reporting this issue!
References
- GHSA-66m2-gx93-v996
Published to the GitHub Advisory Database
Oct 3, 2025