AnthropicGHSA-ph6w-f82w-28w6
Claude Code Vulnerable to Arbitrary Code Execution Due to Insufficient Startup Warning
High8.7Published Sep 2, 2025
When Claude Code was started in a new directory, it displayed a warning asking, "Do you trust the files in this folder?". This warning did not properly document that selecting "Yes, proceed" would allow Claude Code to execute files in the folder without additional confirmation. This may not have been clear to a user so we have updated the warning to clarify this functionality. 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/avivdon for reporting this issue!
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| @anthropic-ai/claude-code npm | < v1.0.87 | v1.0.87 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-94
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 242025 | Claude Code Vulnerable to Arbitrary Code Execution via Plugin Autoloading with Specific Yarn Versions | High7.7 | v1.0.39 |
| 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 |
| Aug 152025 | Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code | High7.1 | v1.0.4 |