🛡️ CVE-2026-33032
🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-306 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-306
Public Exploit ✅ No
Source NVD
Published 2026-03-30
Updated 2026-06-15
Modified 2026-05-05
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/0xjacky/nginx-ui — —
nginx-ui — 2.3.5

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