Vulnerability DatabaseCVE-2026-14537
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CVE-2026-14537
Published:July 31, 2026
Updated:August 06, 2026
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.
Affected Packages
https://github.com/googleapis/mcp-toolbox.git (GITHUB):
Affected version(s) >=v1.3.0 <v1.5.0
Fix Suggestion:
Update to version v1.5.0
github.com/googleapis/mcp-toolbox (GO):
Affected version(s) >=v1.3.0 <v1.5.0
Fix Suggestion:
Update to version v1.5.0
Related Resources (3)
https://github.com/googleapis/mcp-toolbox/pull/3435
https://nvd.nist.gov/vuln/detail/CVE-2026-14537
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14537.json
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CVSS v4
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
UNREPORTED
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Incorrect Authorization
CWE-863
EPSS
Base Score:
0.21