{"id":"CVE-2026-11720","revision":"a621508fb0174bb8ad821104fd2387af","records":[{"revision":"a621508fb0174bb8ad821104fd2387af","observedAt":"2026-10-27T06:23:27.268+00:00","statement":{"source":"nvd","id":"CVE-2026-11720","aliases":[],"title":"A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox.","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":"2026-06-29T18:16:36.173+00:00","modifiedAt":"2026-10-25T21:10:00.77+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · cve-coordination@google.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/googleapis/mcp-toolbox/pull/3218"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-11720","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-22"],"productCriteria":["cpe:2.3:a:google:mcp_toolbox_for_databases:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-06-29T18:16:36.173","lastModified":"2026-10-25T21:10:00.770"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-11720","identifiers":["CVE-2026-11720"]},"retained":false,"historicalAffected":[]}],"coverage":[]}