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CVE-2025-66032

Claude Code Command Validation Bypass Allows Arbitrary Code Execution

Published: Dec 3, 2025Updated: Dec 5, 2025 Sources: CVE List NVD GHSACWE-77
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.6%
Top 54.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-77

Affected Products

claude-codeanthropics
SaaS
AI / ML / llm-serving-inference
claude codeanthropic
SaaS
AI / ML / llm-serving-inference
@anthropic-ai/claude-codenpmOSS Libraries
anthropicscommercialUSAI / MLaka claude-code, anthropic-sdk-python, anthropic-sdk-typescript
anthropiccommercialUSAI / MLaka claude
npmpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://github.com/anthropics/claude-code/security/advisories/GHSA-xq4m-mc3c-vvg3
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-66032
nvd.nist.gov
https://github.com/anthropics/claude-code
github.com

Timeline

Published
Dec 3, 2025
Last Updated
Dec 5, 2025

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