CVE-2025-66032
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-03

Last updated on: 2025-12-05

Assigner: GitHub, Inc.

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 Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-12-03
Last Modified
2025-12-05
Generated
2026-06-16
AI Q&A
2025-12-03
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66032
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
anthropic claude_code to 1.0.93 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability in Claude Code versions prior to 1.0.93 involves errors in parsing shell commands related to $IFS and short CLI flags. These errors allow an attacker to bypass the read-only validation mechanism and execute arbitrary code. Exploiting this vulnerability requires the attacker to be able to add untrusted content into a Claude Code context window.

Impact Analysis

The vulnerability can lead to arbitrary code execution within Claude Code, which means an attacker could run malicious commands or code on the affected system. This could compromise system integrity, confidentiality, and availability, potentially leading to unauthorized access, data loss, or system disruption.

Mitigation Strategies

Upgrade Claude Code to version 1.0.93 or later, as this version contains the fix for the vulnerability that allows bypassing read-only validation and arbitrary code execution.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2025-66032. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart