CVE-2026-14537

Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints

Published Jul 31, 2026 CVSS 4.0 · 8.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Google
Google mcp-toolbox
Vendors & Products Google
Google mcp-toolbox
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints
Weaknesses CWE-863
References
Metrics cvssV4_0

{'score': 8.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Google
Published
Updated
Jul 31, 2026, 4:08 PM
Reserved
Jul 3, 2026, 1:40 AM
Status
Analyzed
Published
Jul 31, 2026, 2:16 AM
Modified
Oct 23, 2026, 11:10 PM