Skip to content

Update to MCP 1.23+

Low
jlowin published GHSA-rcfx-77hg-w2wv Dec 26, 2025

Package

pip fastmcp (pip)

Affected versions

<2.14

Patched versions

>=2.14

Description

There was a recent CVE report on MCP: https://nvd.nist.gov/vuln/detail/CVE-2025-66416.

FastMCP does not use any of the affected components of the MCP SDK directly. However, FastMCP versions prior to 2.14.0 did allow MCP SDK versions <1.23 that were vulnerable to CVE-2025-66416. Users should upgrade to FastMCP 2.14.0 or later.

Severity

Low

CVE ID

No known CVE

Weaknesses

No CWEs

Credits