Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover_CVE-2026-33032

{
    "lastseen": "",
    "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": "2026-03-30T17:58:42.159Z",
    "modified": "2026-03-30T18:37:50.239Z",
    "type": "cve",
    "title": "Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover",
    "source": "GitHub_M",
    "references": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf",
    "id": "CVE-2026-33032",
    "bulletinFamily": "",
    "cwe": [
        "CWE-306"
    ],
    "cvelist": null,
    "sourceData": "0xJacky nginx-ui <= 2.3.5",
    "sourceHref": "",
    "cvss": {
        "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",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "nginx-ui",
    "version": "<= 2.3.5",
    "vendor": "0xJacky",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}