Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| jlowin | fastmcp | < 2.13.0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | fastmcp | < 2.13.0 | 2.13.0 | GHSA-rj5c-58rq-j5g5 |