CVEvulnerability

CVE-2025-69196

7.4 HIGH Published 2026-03-16 Modified 2026-07-15 Official page ↗
Status
Modified
Published
2026-03-16
Last modified
2026-07-15
Assigner
[email protected]
CVSS 4.0 ([email protected])
7.4 HIGH — CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-1220, CWE-863

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.

Affected configurations

• jlowin fastmcp (< 2.14.2)

Related

Weakness · CWE (2)

  • CWE-1220 Insufficient Granularity of Access Control weakness
  • CWE-863 Incorrect Authorization weakness

References