---
id: CVE-2026-84319
title: Nginx UI is a web user interface for the Nginx web server
summary: >-
  Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the
  regular HTTP configuration API rejects restricted Nginx directives such as
  load_module, js_import, and js_content. However, the MCP configuration
  interface al…
severity: high
cvss: 8.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H'
cwe:
  - CWE-693
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T21:17:22.517'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84319'
references:
  - url: >-
      https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2
    label: security-advisories@github.com
  - url: 'https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-5r62-gj48-897x
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-12T22:05:40.369Z'
---

## Overview

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the regular HTTP configuration API rejects restricted Nginx directives such as load_module, js_import, and js_content. However, the MCP configuration interface allows a secondary authenticated user to write and apply equivalent restricted configuration content. This allows the user to load ngx_http_js_module.so, import attacker-controlled JavaScript, reload Nginx, and execute NJS in the Nginx worker context. This issue is fixed in version 2.4.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.