CVE-2026-14537

Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints

Published: Jul 31, 2026Updated: Aug 8, 2026 Sources: CVE List NVDCWE-863

9.8CRITICAL

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-863

Affected Products

Google

commercial·USaka google inc, google llc

mcp-toolboxOn-prem

Mobile Apps / android-app

mcp toolbox for databasesOn-premDatabase

Databases / db-tooling

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

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

github.com

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