What is the CVSS score of CVE-2025-66032?

CVE-2025-66032 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2025-66032?

Yes, a public proof-of-concept exploit is available for CVE-2025-66032. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-66032?

Within 24 hours: Inventory all Claude Code deployments and identify instances processing external or user-supplied content. Within 7 days: Immediately upgrade to Claude Code version 1.0.93 or later across all systems; if upgrading is not possible, disable Claude Code functionality pending patch availability. Within 30 days: Conduct a security audit of Claude Code usage patterns and implement input validation controls to prevent future similar vulnerabilities.

Claude Code CVE-2025-66032

Q: Which versions of Claude Code are affected by CVE-2025-66032?

Claude Code versions prior to 1.0.93 contain a critical vulnerability (CVSS 9.8) that allows attackers to execute arbitrary code by injecting malicious content into the tool's context.. A patch is available.

EUVD-2025-201016 CRITICAL

Command Injection (CWE-77)

2025-12-03 security-advisories@github.com

GHSA-xq4m-mc3c-vvg3

RCE Command Injection Claude Code Anthropic

9.8

CVSS 3.1 · GitHub Advisory

View

Vulnerability Assessment

Weakness	CWE CWE-77 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Command injection prevention MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	Full system compromise — the attacker can execute any command with the privileges of the vulnerable application process. With a CVSS score of 9.8 (CRITICAL), this represents a critical risk.
Exploit ScenarioDerived	An attacker injects shell metacharacters (;, \|, &&) into a parameter that is passed to a system command, causing additional commands to be executed.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

Patch available 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 15, 2026

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.

Earlier versions of this analysis (1)

v1 Mar 15, 2026 - 16:14 CVSS 9.8

RemediationAI

Avoid passing user input to system commands. Use language-specific APIs instead of shell commands. If unavoidable, use strict input validation and escaping.

Affected VersionsENISA

claude-code < 1.0.93

Affected Packages

npm @anthropic-ai/claude-code fix: 1.0.93

euvd claude_code fix: 1.0.93

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in npm, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Command injection allows an attacker to execute arbitrary OS commands on the host system through a vulnerable application that passes user input to system shells.

Know when Claude Code gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

GitHub Advisory PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Dec 03, 2025 - 19:15 nvd

CRITICAL 9.8

Executive ViewAI

Why It Matters

Claude Code versions prior to 1.0.93 contain a critical vulnerability (CVSS 9.8) that allows attackers to execute arbitrary code by injecting malicious content into the tool's context. Organizations using Claude Code are at immediate risk if they process untrusted inputs or allow external content integration, potentially enabling full system compromise.

Business Impact: Severe

Compensating Controls

Until patch 1.0.93 is applied: (1) Disable Claude Code if not operationally critical; (2) Implement strict network segmentation isolating Claude Code instances from sensitive systems and data; (3) Enforce mandatory input sanitization and validation for all external content before Claude Code processing; (4) Restrict Claude Code access to authenticated users only with multi-factor authentication; (5) Enable comprehensive logging and monitoring of Claude Code execution for threat detection; (6) Implement application whitelisting to restrict Claude Code process execution capabilities.

Threat Intelligence Overview

EPSS Score

0.1%

Top 83% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity + public POC available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

More in Claude Code

View all

CVE-2026-35022 CRITICAL Act Now POC

9.3 Apr 06

OS command injection in Anthropic Claude Code CLI and Agent SDK for Python allows remote, unauthenticated attackers to e

CVE-2025-59536 HIGH This Week POC

8.7 Oct 03

Code injection in Anthropic's Claude Code CLI before version 1.0.111 allows malicious code embedded in a project directo

CVE-2026-35020 HIGH This Week POC

8.6 Apr 06

OS command injection in Anthropic Claude Code CLI and Claude Agent SDK for Python allows local attackers to execute arbi

CVE-2026-35021 HIGH This Week POC

8.4 Apr 06

OS command injection in Anthropic Claude Code CLI and Claude Agent SDK for Python enables arbitrary command execution vi

CVE-2026-39861 HIGH This Week POC

7.7 Apr 21

Sandbox escape in Claude Code versions prior to 2.1.64 enables arbitrary file writes outside the workspace by exploiting

CVE-2026-25725 CRITICAL Act Now

10.0 Feb 06

Claude Code prior to version 2.1.2 has a CVSS 10.0 sandbox escape in the bubblewrap sandboxing mechanism, allowing code

CVE-2026-25722 CRITICAL Act Now

9.1 Feb 06

Claude Code prior to version 2.0.57 failed to properly validate MCP tool inputs, allowing malicious MCP servers to injec

CVE-2026-24887 HIGH This Week POC

8.8 Feb 03

Claude Code versions before 2.0.72 allow authenticated attackers to execute arbitrary commands by exploiting a command p

CVE-2025-64755 HIGH This Week

8.7 Nov 21

Claude Code is an agentic coding tool. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no au

CVE-2026-55607 HIGH This Week

7.7 Jun 29

Sandbox escape and code execution in Anthropic's Claude Code CLI (versions 2.1.38 through 2.1.162) lets a malicious repo

CVE-2025-65099 HIGH This Week

7.7 Nov 19

Claude Code is an agentic coding tool. Rated high severity (CVSS 7.7), this vulnerability is remotely exploitable, no au

CVE-2025-59828 HIGH This Week

7.7 Sep 24

Claude Code is an agentic coding tool. Rated high severity (CVSS 7.7), this vulnerability is remotely exploitable, no au

Same weakness CWE-77 – Command Injection

View all

CVE-2024-21887 CRITICAL POC

9.1

CVE-2016-3081 HIGH POC

8.1

CVE-2012-1823 CRITICAL POC

9.8

CVE-2016-1555 CRITICAL POC

9.8

CVE-2024-55956 CRITICAL POC

9.8

CVE-2015-2051 HIGH POC

8.8

CVE-2017-6327 HIGH POC

8.8

CVE-2023-34960 CRITICAL POC

9.8

Same technique RCE

View all

CVE-2021-44228 CRITICAL POC

10.0

CVE-2017-7269 CRITICAL POC

9.8

CVE-2022-47966 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2023-3519 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2016-4117 CRITICAL POC

9.8

CVE-2015-3113 CRITICAL POC

9.8

References

Advisories & patches

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

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back