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GHSA-xq4m-mc3c-vvg3

Claude Code Command Validation Bypass Allows Arbitrary Code Execution

Source: GitHub Advisory Database (reviewed) High CVE-2025-66032

Packages

EcosystemPackageAffectedFixed in
npm @anthropic-ai/claude-code < 1.0.93 1.0.93

Details

As written in the advisory (Markdown source, shown as plain text).

Due to errors in parsing shell commands related to $IFS and short CLI flags, it was possible to bypass the Claude Code read-only validation and trigger arbitrary code execution. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window. Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version. Thank you to [RyotaK](hxxps://ryotak.net) from [GMO Flatt Security Inc.](hxxps://flatt.tech/en/) for reporting this issue!

References

External links from the advisory. They lead to third-party sites.