{"id":"CVE-2026-11720","revision":"f2141d90e8d74f9b9bf6477ab501dd21","records":[{"revision":"f2141d90e8d74f9b9bf6477ab501dd21","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-11720","aliases":[],"title":"Path Traversal in googleapis/mcp-toolbox HTTP Tool URL Builder","description":"A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox.\n\nWhen 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).","state":0,"publishedAt":"2026-06-29T17:51:30.077+00:00","modifiedAt":"2026-06-29T18:26:17.242+00:00","affected":[{"ecosystem":"Vendor product","name":"MCP Toolbox for Databases (googleapis/mcp-toolbox)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Google\",\n                    \"product\": \"MCP Toolbox for Databases (googleapis/mcp-toolbox)\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.3.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":9.3,"severity":"CRITICAL"}],"references":["https://github.com/googleapis/mcp-toolbox/pull/3218"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-11720","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-11720","identifiers":["CVE-2026-11720"]},"retained":false,"historicalAffected":[]}],"coverage":[]}