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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00139.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Anthropic Subscribe
Claude Code Subscribe
Anthropics Subscribe
Claude Code Subscribe

Configuration 1 [-]

cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*

No data.

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Vendors Products
Anthropics Subscribe
Claude Code Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-xq4m-mc3c-vvg3 Claude Code Command Validation Bypass Allows Arbitrary Code Execution
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/anthropics/claude-code/security/advisories/GHSA-xq4m-mc3c-vvg3 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-66032 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-66032 cve-icon
History

Sat, 06 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Important

Fri, 05 Dec 2025 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Anthropic
Anthropic claude Code
CPEs cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*
Vendors & Products Anthropic
Anthropic claude Code
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Thu, 04 Dec 2025 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Anthropics
Anthropics claude Code
Vendors & Products Anthropics
Anthropics claude Code

Wed, 03 Dec 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 03 Dec 2025 18:30:00 +0000

Type Values Removed Values Added
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.
Title Claude Code Command Validation Bypass Allows Arbitrary Code Execution
Weaknesses CWE-77
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-03T19:11:39.067Z

Reserved: 2025-11-21T01:08:02.614Z

Link: CVE-2025-66032

cve-icon Vulnrichment

Updated: 2025-12-03T19:11:27.184Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-03T19:15:57.527

Modified: 2025-12-05T16:29:42.130

Link: CVE-2025-66032

cve-icon Redhat

Severity : Important

Publid Date: 2025-12-03T18:16:54Z

Links: CVE-2025-66032 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-12-04T16:44:09Z

Weaknesses