What is CVE-2025-66032?

CVE-2025-66032 is a critical-severity vulnerability in Anthropic Claude_code, classified under Command Injection. CVSS score: 9.8/10. Published 2025-12-03.

How severe is CVE-2025-66032?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Anthropic Claude_code

CVE-2025-66032

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. Relia…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.006 (46.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Anthropic Claude_code
Anthropics Claude-code — versions < 1.0.93

Weakness classification (CWE)

CWE-77 — Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2025-66032?: CVE-2025-66032 is a critical-severity vulnerability in Anthropic Claude_code, classified under Command Injection. CVSS score: 9.8/10. Published 2025-12-03.
How severe is CVE-2025-66032?: Critical severity. CVSS v3 base score is 9.8 out of 10.