{"cvss":0.0,"datePublished":"2026-04-13T00:00:00Z","dateUpdated":"2026-04-13T00:00:00Z","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.","dueDate":"","id":"CVE-2026-33032","kev_catalogs":["vulncheck"],"knownRansomwareCampaignUse":"Unknown","product":"nginx_ui","requiredAction":"Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.","severity":"HIGH","source":"vulncheck_kev","title":"nginxui nginx_ui Missing Authentication for Critical Functionality","vendor":"nginxui"}