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TI-2026-10123 Aliases CVE-2026-11719GHSA-5gf6-gc35-xjpc

Missing authorization in Google MCP Toolbox for Databases

Priority LOW 38CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-862.

Summary

An authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope enforcement across older protocol handlers. While the 2025-11-25 protocol version handler correctly enforces per-tool restrictions defined by scopesRequired, older supported protocol versions (2025-06-18, 2025-03-26, and 2024-11-05) omit this check. An authenticated client with low-privilege tokens (e.g., read) can bypass the intended per-tool scope restrictions and execute high-privilege tools (e.g., admin) simply by specifying an older protocol version in the MCP-Protocol-Version header, or by omitting the header entirely (which causes the server to default to the vulnerable 2024-11-05 handler).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00145 3rd percentileScored 2026-11-07
Fix Fixed github.com/googleapis/mcp-toolbox (Go): 1.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GoogleMCP Toolbox for Databases (googleapis/mcp-toolbox)1.3.0—No fix listedCNA
—github.com/googleapis/mcp-toolbox (Go)before 1.4.01.4.0Patch availableGHSA-5gf6-gc35-xjpc
  • MCP Toolbox for Databases (googleapis/mcp-toolbox) VendorGoogle Affected 1.3.0 Fixed in — No fix listed CNA
  • github.com/googleapis/mcp-toolbox (Go) Vendor— Affected before 1.4.0 Fixed in 1.4.0 Patch available GHSA-5gf6-gc35-xjpc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:google:mcp_toolbox_for_databases:1.3.0:*:*:*:*:*:*:*1.3.0VulnerableGoogle
  • cpe:2.3:a:google:mcp_toolbox_for_databases:1.3.0:*:*:*:*:*:*:* Versions 1.3.0 Vulnerable ·Google

Remediation

  • Fix · GHSA-5gf6-gc35-xjpc github.com/googleapis/mcp-toolbox (Go) Fixed in 1.4.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11719
  2. 2026-10-03 Alias added: GHSA-5gf6-gc35-xjpc

References

Patch 2

Advisory 1

Other 1

  • TI-2026-10124 Path Traversal in googleapis/mcp-toolbox HTTP Tool URL Builder CVSS 4.0CRITICAL 9.3
  • TI-2026-10122 Improper authentication in Google MCP Toolbox for Databases CVSS 4.0CRITICAL 9.3
  • TI-2026-10121 Improper authentication in Google MCP Toolbox for Databases CVSS 4.0CRITICAL 9.3
  • TI-2026-12267 Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints CVSS 4.0HIGH 8.1
  • TI-2026-12271 Authentication Bypass and Audience Confusion in MCP Toolbox OAuth Provider CVSS 4.0HIGH 8.0
  • TI-2026-12270 Server-Side Request Forgery via Unrestricted HTTP Redirection in MCP Toolbox CVSS 4.0HIGH 8.0
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences