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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.

PUBLISHED Reserved 2025-10-22 | Published 2025-10-28 | Updated 2025-10-29 | Assigner GitHub_M




MEDIUM: 5.4CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

< 2.13.0
affected

References

github.com/...astmcp/security/advisories/GHSA-rj5c-58rq-j5g5

cve.org (CVE-2025-62801)

nvd.nist.gov (CVE-2025-62801)

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