CVE-2026-33032

{"id": "CVE-2026-33032", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2026-03-30T18:16:19.410", "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://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-306"}]}], "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."}, {"lang": "es", "value": "Nginx UI es una interfaz de usuario web para el servidor web Nginx. En las versiones 2.3.5 y anteriores, la integraci\u00f3n MCP (Model Context Protocol) de nginx-ui expone dos puntos finales HTTP: /mcp y /mcp_message. Mientras que /mcp requiere tanto la lista blanca de IP como la autenticaci\u00f3n (middleware AuthRequired()), el punto final /mcp_message solo aplica la lista blanca de IP, y la lista blanca de IP predeterminada est\u00e1 vac\u00eda, lo que el middleware trata como 'permitir todo'. Esto significa que cualquier atacante de red puede invocar todas las herramientas MCP sin autenticaci\u00f3n, incluyendo reiniciar nginx, crear/modificar/eliminar archivos de configuraci\u00f3n de nginx y activar recargas autom\u00e1ticas de configuraci\u00f3n, logrando una toma de control completa del servicio nginx. En el momento de la publicaci\u00f3n, no hay parches disponibles p\u00fablicamente."}], "lastModified": "2026-04-01T18:19:13.610", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DAD68C0D-27F9-48C7-8D1A-05EF5E2F7F7B", "versionEndIncluding": "2.3.5"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}