CVE-2026-33032 in 0xJacky nginx-ui

Résumé (Anglaise)

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.

Responsable

GitHub_M

Réserver

17/03/2026

Divulgation

30/03/2026

Entrées

VulDB provides additional information and datapoints for this CVE:

ID	Vulnérabilité	CWE	Exp	Con	CVE
354241	0xJacky nginx-ui Model Context Protocol mcp AuthRequired authentification faible	306	Non défini	Non défini	CVE-2026-33032