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TI-2026-10124 Aliases CVE-2026-11720GHSA-vwxw-jrg6-9jxv

Path Traversal in googleapis/mcp-toolbox HTTP Tool URL Builder

Priority MEDIUM 49CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox. When constructing downstream API requests, the URL builder substitutes user-controlled pathParams into the configured tool path and parses the resulting string as a relative URL. While it checks that the input does not alter the scheme, host, or user info, it relies on ResolveReference for the final URL resolution. Because dot segments (../) are normalized during this resolution step, an attacker can supply path parameters containing directory traversal sequences to escape the operator-configured path scope. This allows the client to coerce the toolbox into making requests to unintended endpoints on the same target host while forwarding the toolbox's configured credentials (e.g., bypassing a restricted path like /api/v1/users/{{.id}} to reach /admin/secrets).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00533 45th percentileScored 2026-11-07
Fix Fixed MCP Toolbox for Databases (googleapis/mcp-toolbox) (Google): 1.3.0github.com/googleapis/mcp-toolbox (Go): 1.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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)before 1.3.01.3.0Patch availableCNA
—github.com/googleapis/mcp-toolbox (Go)before 1.3.01.3.0Patch availableGHSA-vwxw-jrg6-9jxv
  • MCP Toolbox for Databases (googleapis/mcp-toolbox) VendorGoogle Affected before 1.3.0 Fixed in 1.3.0 Patch available CNA
  • github.com/googleapis/mcp-toolbox (Go) Vendor— Affected before 1.3.0 Fixed in 1.3.0 Patch available GHSA-vwxw-jrg6-9jxv

CPE configurations NVD · 1

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

Remediation

  • Fix · CNA MCP Toolbox for Databases (googleapis/mcp-toolbox) (Google) Fixed in 1.3.0
  • Fix · GHSA-vwxw-jrg6-9jxv github.com/googleapis/mcp-toolbox (Go) Fixed in 1.3.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11720
  2. 2026-10-03 Alias added: GHSA-vwxw-jrg6-9jxv

References

Patch 1

Advisory 1

Other 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
  • TI-2026-13310 SQL Injection and Security Boundary Bypass in googleapis/mcp-toolbox CVSS 4.0HIGH 8.6
See all 10 →

Sources

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