{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33032","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-17T17:22:14.670Z","datePublished":"2026-03-30T17:58:42.159Z","dateUpdated":"2026-04-16T21:42:59.787Z"},"containers":{"cna":{"title":"Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover","problemTypes":[{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"CWE-306: Missing Authentication for Critical Function","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf"}],"affected":[{"vendor":"0xJacky","product":"nginx-ui","versions":[{"version":"<= 2.3.5","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-30T17:58:42.159Z"},"descriptions":[{"lang":"en","value":"Nginx UI is a web user interface for the Nginx web server. In versions 2.3.5 and prior, the nginx-ui MCP (Model Context Protocol) integration exposes two HTTP endpoints: /mcp and /mcp_message. While /mcp requires both IP whitelisting and authentication (AuthRequired() middleware), the /mcp_message endpoint only applies IP whitelisting - and the default IP whitelist is empty, which the middleware treats as \"allow all\". This means any network attacker can invoke all MCP tools without authentication, including restarting nginx, creating/modifying/deleting nginx configuration files, and triggering automatic config reloads - achieving complete nginx service takeover. At time of publication, there are no publicly available patches."}],"source":{"advisory":"GHSA-h6c2-x2m2-mwhf","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-30T18:37:45.494292Z","id":"CVE-2026-33032","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-30T18:37:50.239Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-04-16T21:42:59.787Z"},"references":[{"url":"https://websec.net/blog/cve-2026-33032-unauthenticated-nginx-ui-mcp-takeover-69e1200f9fceb1f3fbe9c47f"}],"title":"CVE Program Container","x_generator":{"engine":"ADPogram 0.0.1"}}]}}