AnthropicGHSA-2jjv-qf24-vfm4
Claude Code Vulnerable to Arbitrary Code Execution via Plugin Autoloading with Specific Yarn Versions
High7.7CVE-2025-59828 · Published Sep 24, 2025 · updated Dec 22, 2025
When using Claude Code with Yarn installed, Yarn config files can trigger code execution when running `yarn --version`. This could lead to a bypass of the directory trust dialog in Claude Code, as plugins and `yarnPath` could be executed prior to the user accepting the risks of working in an untrusted directory. 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 Benjamin Faller, Redguard AG and Michael Hess for reporting this issue!
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| @anthropic-ai/claude-code npm | < v1.0.39 | v1.0.39 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Severity from
- GitHub (reviewed advisory)
More Anthropic advisories
All Anthropic| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Oct 32025 | Command execution prior to Claude Code startup trust dialog | High8.7 | v1.0.111 |
| Oct 32025 | Permission deny bypass through symlink | Low2.3 | v1.0.120 |
| Sep 92025 | Command Injection in Claude Code rg command allowed bypass of user approval prompt for command execution | High8.7 | 1.0.105 |
| Sep 92025 | Claude Code vulnerable to arbitrary code execution caused by maliciously configured git email | High8.7 | 1.0.105 |
| Sep 22025 | Claude Code Vulnerable to Arbitrary Code Execution Due to Insufficient Startup Warning | High8.7 | v1.0.87 |
| Aug 152025 | Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code | High7.1 | v1.0.4 |