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Vulnerability record · CVE-2026-14537 · published 31 July 2026

CVE-2026-14537: Google mcp toolbox for databases incorrect authorization vulnerability

Google · Mcp Toolbox For Databases

Incorrect Authorization in the direct HTTP API tool invocation endpoint in Google mcp-toolbox versions v1.3.0 and v1.4.0 allows an unauthenticated attacker to invoke tools protected by the scopeRequired feature via sending tool invocation requests through legacy HTTP endpoints when the --enable-api flag is active.

8.1 CVSS 4.0 High EPSS 0.25% · top 85.1% CWE-863 · Incorrect authorization
8.1CVSS 4.0 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
8 Aug 2026Last modified by NVD

Description

Incorrect Authorization in the direct HTTP API tool invocation endpoint in Google mcp-toolbox versions v1.3.0 and v1.4.0 allows an unauthenticated attacker to invoke tools protected by the scopeRequired feature via sending tool invocation requests through legacy HTTP endpoints when the --enable-api flag is active.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/googleapis/mcp-toolbox/pull/3435 Issue TrackingPatch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-11720Google mcp toolbox for databases path traversal vulnerabilityA path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox. When constructing downstream API requests, the URL buil…EPSS 0.53%9.3CVE-2026-11717Google mcp toolbox for databases improper authentication vulnerabilityAn authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox. When verif…EPSS 0.18%9.3CVE-2026-11718Google mcp toolbox for databases improper authentication vulnerabilityAn authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox. When the t…EPSS 0.19%8.6CVE-2026-15829Google mcp toolbox for databases sql injection vulnerabilityA SQL injection (CWE-89) and security boundary bypass (CWE-863) vulnerability exists in the prebuilt BigQuery forecasting tool (bigquery-forecast) of…EPSS 0.18%8.6CVE-2026-11719Google mcp toolbox for databases missing authorization vulnerabilityAn authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope enforcement across older protocol handle…EPSS 0.15%8.0CVE-2026-14541Google mcp toolbox for databases improper authentication vulnerabilityAn authentication bypass and audience confusion vulnerability exists in the Google OAuth provider component of Google mcp-toolbox version 1.4.0. When…EPSS 0.25%8.0CVE-2026-14540Google mcp toolbox for databases server-side request forgery (ssrf) vulnerabilityA Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Google mcp-toolbox versions 0.3.0 through…EPSS 0.13%6.6CVE-2026-14539Google mcp toolbox for databases allocation without limits vulnerabilityAn allocation of resources without limits vulnerability in the HTTP handler component of Google mcp-toolbox versions up to and including 1.4.0 allows…EPSS 0.24%

Source: NIST National Vulnerability Database (record CVE-2026-14537), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.