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Vulnerability DatabaseGHSA-rcfx-77hg-w2wv

GHSA-rcfx-77hg-w2wv: 
Model Context Protocol vulnerability analysis and mitigation

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.

Source: NVD

Related Model Context Protocol vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-63127HIGH8.2
  • Model Context Protocol logoModel Context Protocol
  • goose.src
NoYesSep 16, 2026
CVE-2026-63128HIGH7.5
  • Model Context Protocol logoModel Context Protocol
  • rmcp
NoYesSep 16, 2026
GHSA-h669-8m4g-r2hcHIGH7.5
  • Model Context Protocol logoModel Context Protocol
  • mcp
NoYesJul 30, 2026
CVE-2026-64684MEDIUM6.8
  • Model Context Protocol logoModel Context Protocol
  • goose
NoYesSep 16, 2026
GHSA-c9xm-49cp-xcr9MEDIUM6.3
  • Model Context Protocol logoModel Context Protocol
  • rmcp
NoYesOct 02, 2026

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