fastmcp
PyPI6 known CVEs affecting this package
Aggregated from OSV, GitHub Security Advisories, NVD, and vendor advisories. Each CVE links to its full detail page with vendor advisories, patches, fixed versions, and remediation guidance.
CVEs affecting fastmcppage 1 of 1
- CVE-2025-62800MEDIUMCVSS 6.1EG 6.1✓ Fixed in 2.13.02025-10-28
vulnerable: 0.1.0 ... 2.9.2 (67 versions)
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 …
- CVE-2025-62801HIGHCVSS 7.8EG 7.8✓ Fixed in 2.13.02025-10-28
vulnerable: 0.1.0 ... 2.9.2 (67 versions)
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…
- CVE-2025-64340MEDIUMCVSS 6.7EG 6.7✓ Fixed in 3.2.02026-04-03
vulnerable: 0.1.0 ... 3.1.1 (90 versions)
FastMCP is the standard framework for building MCP applications. Prior to version 3.2.0, server names containing shell metacharacters (e.g., &) can cause command injection on Windows when passed to fastmcp install claude-code or fastmcp in…
- CVE-2025-69196MEDIUMCVSS 6.5EG 6.5✓ Fixed in 2.14.22026-03-16
vulnerable: 0.1.0 ... 2.9.2 (75 versions)
FastMCP is the standard framework for building MCP applications. Prior to version 2.14.2, the server does not properly respect the resource parameter submitted by the client in the authorization and token request. Instead of issuing the to…
- CVE-2026-27124MEDIUMCVSS 6.1EG 6.1✓ Fixed in 3.2.02026-04-03
vulnerable: 0.1.0 ... 3.1.1 (90 versions)
FastMCP is the standard framework for building MCP applications. Prior to version 3.2.0, while testing the GitHubProvider OAuth integration, which allows authentication to a FastMCP MCP server via a FastMCP OAuthProxy using GitHub OAuth, i…
- CVE-2026-32871CRITICALCVSS 10.0EG 10.0✓ Fixed in 3.2.02026-04-02
vulnerable: 0.1.0 ... 3.1.1 (90 versions)
FastMCP is a Pythonic way to build MCP servers and clients. Prior to version 3.2.0, the OpenAPIProvider in FastMCP exposes internal APIs to MCP clients by parsing OpenAPI specifications. The RequestDirector class is responsible for constru…
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