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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| fastmcp(PyPI) | 0 | 2.13.0 | N/A |
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