Fastmcp Jlowin Fastmcp

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By the Year

In 2026 there have been 0 vulnerabilities in Jlowin Fastmcp. Last year, in 2025 Fastmcp had 2 security vulnerabilities published. Right now, Fastmcp is on track to have less security vulnerabilities in 2026 than it did last year.

Year Vulnerabilities Average Score
2026 0 0.00
2025 2 0.00

It may take a day or so for new Fastmcp vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.

Recent Jlowin Fastmcp Security Vulnerabilities

FastMCP <2.13 command injection via server_name on Windows
CVE-2025-62801 - October 28, 2025

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the server_name field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fixed in 2.13.0.

Shell injection

FastMCP <2.13.0 Reflected XSS in oauth_callback.py
CVE-2025-62800 - October 28, 2025

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page (oauth_callback.py) where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScript execution in the callback server origin. The issue is fixed in version 2.13.0.

XSS

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