PT-2026-66667 · Google · Mcp-Toolbox

He Wei · CVE-2026-14541 · Publicado 2026-07-31 · Atualizado 2026-07-31

NVD

CVSS v4.0

8.0

Alta

Vetor base

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/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

An authentication bypass and audience confusion vulnerability exists in the Google OAuth provider component of Google mcp-toolbox version 1.4.0. When a Google authService is initialized with mcpEnabled: true but lacks an explicitly defined audience or clientId, the ValidateMCPAuth pipeline for opaque tokens skips audience validation entirely. As a result, the toolbox will accept any valid Google OAuth access token—even those minted for unrelated ecosystem applications—granting unauthorized clients access to protected tools and data backends.

Correção

Improper Authentication

Enumeração de Fraquezas

CWE-287

Identificadores relacionados

CVE-2026-14541

Produtos afetados

Mcp-Toolbox

Referências · 2

• https://github.com/googleapis/mcp-toolbox/pull/3450 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-14541 · Nota de Segurança