critical9.8
CVE-2025-66032
Claude Code Command Validation Bypass Allows Arbitrary Code Execution
Impact
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!
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @anthropic-ai/claude-code | < 1.0.93 | 1.0.93 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Anthropic | Claude Code | before 1.0.93 |