CVE-2025-66401
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-01

Last updated on: 2026-02-06

Assigner: GitHub, Inc.

Description
MCP Watch is a comprehensive security scanner for Model Context Protocol (MCP) servers. In 0.1.2 and earlier, the MCPScanner class contains a critical Command Injection vulnerability in the cloneRepo method. The application passes the user-supplied githubUrl argument directly to a system shell via execSync without sanitization. This allows an attacker to execute arbitrary commands on the host machine by appending shell metacharacters to the URL.
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Meta Information
Published
2025-12-01
Last Modified
2026-02-06
Generated
2026-06-16
AI Q&A
2025-12-02
EPSS Evaluated
2026-06-14
NVD
CVE-2025-66401
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
kapilduraphe mcp_watch to 0.1.2 (exc)
mcp_watch mcp_scanner *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
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Executive Summary

This vulnerability is a critical Command Injection flaw in the MCPScanner class of MCP Watch version 0.1.2 and earlier. The cloneRepo method takes a user-supplied githubUrl argument and passes it directly to a system shell using execSync without sanitizing the input. This allows an attacker to append shell metacharacters to the URL and execute arbitrary commands on the host machine.

Impact Analysis

An attacker exploiting this vulnerability can execute arbitrary commands on the host machine running MCP Watch. This can lead to full system compromise, including unauthorized access, data theft, data modification, or denial of service.

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