CVE-2025-69196

HIGH SEVERITY

CVSS Score & Metrics

Base Score

6.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N                                    

Vulnerability Description

FastMCP is the standard framework for building MCP applications. Prior to version 2.14.2, the server does not properly respect the resource parameter submitted by the client in the authorization and token request. Instead of issuing the token explicitly for the MCP server, the token is issued for the base_url passed to the OAuthProxy during initialization. This issue has been patched 2.14.2.

Vulnerability Details

Published Date

March 16, 2026

Last Modified

March 18, 2026

CWE ID

CWE-863

Source

GitHub

Vendor

pip

Product

fastmcp

External References

https://github.com/PrefectHQ/fastmcp/security/advisories/GHSA-5h2m-4q8j-pqpj
https://github.com/advisories/GHSA-5h2m-4q8j-pqpj

CVE-2025-69196

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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