CVE-2025-66032: Anthropic Claude Code

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Claude Code is an agentic coding tool. Prior to 1.0.93, 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. This vulnerability is fixed in 1.0.93.

Affected products

• Anthropic Claude Code: before 1.0.93 (fixed in 1.0.93)

Published 2025-12-03. Last modified 2026-06-17.