{"cve":"CVE-2026-11624","nvd":{"published":"2026-06-13T10:16:17.700","modified":"2026-07-23T09:10:00.113","status":"Awaiting Analysis","description":"The Model Context Protocol has a security warning advising servers to validate the \"Origin\" header on all incoming connections to prevent DNS rebinding attacks. Prior to the v0.25.0 release, users had no way to validate the origin's host. In v0.25.0, a new \"--allowed-hosts\" flag was introduced alongside the existing \"--allowed-origins\" flag, enabling users to specify permitted hosts at server startup. Both flags default to \"*\", allowing users to implement strict access controls as needed without breaking existing setups. If either flag is set to \"*\", the server will output a startup warning about potential vulnerabilities. Documentation has also been updated to highlight these security considerations.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","score":9.4},"cvss_v3":null,"cwes":["CWE-346"],"references":["https://github.com/googleapis/mcp-toolbox/issues/3113","https://github.com/googleapis/mcp-toolbox/pull/2254"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-11624","score":0.00219,"percentile":0.12482,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-76g7-m3xw-x9gr","url":"https://osv.dev/vulnerability/GHSA-76g7-m3xw-x9gr","summary":"MCP Toolbox for Databases has an Origin Validation Error","modified":"2026-09-10T03:50:48.612279592Z","packages":[{"ecosystem":"Go","name":"github.com/googleapis/mcp-toolbox","purl":"pkg:golang/github.com/googleapis/mcp-toolbox","ranges":["<0.25.0"],"fixed":["0.25.0"]}]},{"id":"GO-2026-6288","url":"https://osv.dev/vulnerability/GO-2026-6288","summary":"MCP Toolbox for Databases has an Origin Validation Error in github.com/googleapis/genai-toolbox","modified":"2026-08-26T01:19:16.136575315Z","packages":[{"ecosystem":"Go","name":"github.com/googleapis/genai-toolbox","purl":"pkg:golang/github.com/googleapis/genai-toolbox","ranges":["<0.25.0"],"fixed":["0.25.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}