High severity7.8NVD Advisory· Published Oct 28, 2025· Updated Jun 17, 2026

CVE-2025-62801

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
fastmcpPyPI	< 2.13.0	2.13.0

Affected products

Jlowin/Fastmcp2 versions
cpe:2.3:a:jlowin:fastmcp:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:jlowin:fastmcp:*:*:*:*:*:*:*:*range: <2.13.0
- (no CPE)range: < 2.13.0
ghsa-coords
pkg:pypi/fastmcp
Range: < 2.13.0

Patches

Vulnerability mechanics

References

github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5nvdExploitThird Party AdvisoryWEB
github.com/advisories/GHSA-rj5c-58rq-j5g5ghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2025-62801ghsaADVISORY

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cvss	0.507
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000