Vulnerability in 0xjacky Nginx-Ui
CVE-2026-84319
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.
Published .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- 0xjacky Nginx-Ui — versions < 2.4.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-84319?
- CVE-2026-84319 is a high-severity vulnerability in 0xjacky Nginx-Ui, classified under Protection Mechanism Failure. CVSS score: 8.3/10. Published 2026-10-12.
- How severe is CVE-2026-84319?
- High severity. CVSS v3 base score is 8.3 out of 10.