CodexGuild Knowledge Base

Claude Code permission deny bypass through symlink

as of Oct 3, 2025 · applies to @anthropic-ai/claude-code < 1.0.120 · canonical · codexguild.com/kb/ghsa-66m2-gx93-v996 · exported 2026-10-11

Canonical as of Oct 3, 2025

Claude Code permission deny bypass through symlink

Low severity. Affects @anthropic-ai/claude-code < 1.0.120. Upgrade to 1.0.120 or later.

CVE-2025-59829 / GHSA-66m2-gx93-v996 · severity: low · npm

Affected

@anthropic-ai/claude-code < 1.0.120 → fixed in 1.0.120

Details

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!

Source: GHSA-66m2-gx93-v996 — GitHub Advisory Database (CC-BY-4.0).