Headline
GHSA-x5gv-jw7f-j6xj: Claude Code's Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code
Due to an overly broad allowlist of safe commands, it was possible to bypass the Claude Code confirmation prompts to read a file and then send file contents over the network without user confirmation. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window.
Users on standard Claude Code auto-update received this fix automatically after release. Current users of Claude Code are unaffected, as versions prior to 1.0.24 are deprecated and have been forced to update.
Thank you to https://hackerone.com/wunderwuzzi23 for reporting this issue!
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-55284
Claude Code’s Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code
High severity GitHub Reviewed Published Aug 15, 2025 in anthropics/claude-code • Updated Aug 18, 2025
Package
npm @anthropic-ai/claude-code (npm)
Affected versions
< 1.0.4
Due to an overly broad allowlist of safe commands, it was possible to bypass the Claude Code confirmation prompts to read a file and then send file contents over the network without user confirmation. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window.
Users on standard Claude Code auto-update received this fix automatically after release. Current users of Claude Code are unaffected, as versions prior to 1.0.24 are deprecated and have been forced to update.
Thank you to https://hackerone.com/wunderwuzzi23 for reporting this issue!
References
- GHSA-x5gv-jw7f-j6xj
- https://nvd.nist.gov/vuln/detail/CVE-2025-55284
Published to the GitHub Advisory Database
Aug 18, 2025
Last updated
Aug 18, 2025
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