{"id":"CVE-2026-33032","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-33032","generatedAt":"2026-10-31T05:59:16.998Z","title":"In versions 2.3.5 and prior, the nginx-ui MCP (Model Context Protocol) integration exposes two HTTP endpoints: /mcp and /mcp_message.","description":"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.","published":"2026-03-30T18:16:19.000Z","lastModified":"2026-06-17T10:36:49.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-306"],"affected":["nginxui/nginx ui"],"epss":{"score":0.35273,"percentile":0.98442,"date":"2026-10-30","history":[{"date":"2026-09-24","score":0.02523,"percentile":0.84178},{"date":"2026-10-25","score":0.35273,"percentile":0.98433}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 35.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-25T00:00:00.000Z","detail":{"to":0.35273,"from":0.02523,"percentile":0.98433},"summary":"EPSS moved from 2.5% to 35.3% probability of exploitation in the next thirty days."},{"kind":"epss","label":"EPSS jump","at":"2026-09-24T00:00:00.000Z","detail":{"to":0.02523,"from":0.36299,"percentile":0.84178},"summary":"EPSS moved from 36.3% to 2.5% probability of exploitation in the next thirty days."}],"references":[{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf","tags":["Exploit","Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://websec.net/blog/cve-2026-33032-unauthenticated-nginx-ui-mcp-takeover-69e1200f9fceb1f3fbe9c47f","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf","tags":["Exploit","Mitigation","Vendor Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-33032","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}