CVE-2026-84319CWE-693

CVE-2026-84319

High · published October 13, 2026

CVSS v3.1
8.3
EPSS
0%
Percentile
19.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00280 · 19.4th percentile
Weakness
CWE-693 · Protection Mechanism Failure
Published
2026-10-13T01:17Z
References (3)
https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2 · [email protected]https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1 · [email protected]https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-5r62-gj48-897x · [email protected]
EPSS history
Timeline
  • 14 OCT 03:33Z
    EPSS moved — → 0%
    epss
  • 12 OCT 21:03Z
    Nginx UI: MCP configuration tools bypass restricted directive validation and allow secondary authenticated users to execute NJS in Nginx worker context
    cvelistv5
  • 12 OCT 21:03Z
    Nginx UI: MCP configuration tools bypass restricted directive validation and allow secondary authenticated users to execute NJS in Nginx worker context
    cvelistv5