High 8.1Published Jul 30, 2026

CVE-2026-14537Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints

Updated under an hour ago (Oct 26, 2026, 4:23 PM ET)

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It affects Google mcp-toolbox and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Google mcp-toolbox

Exploited in the last 30 days

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: 8.1 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Google
NVD analysis: Analyzed
Record last updated: Jul 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Google mcp-toolbox google:mcp_toolbox (from the name)	1.3.0; v1.4.0	CNA record
google mcp_toolbox_for_databases google:mcp_toolbox_for_databases	1.3.0; 1.4.0	NVD

References

References

https://github.com/googleapis/mcp-toolbox/pull/3435	issue-tracking, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.