Nginx UI Vulnerability in Web Server Interface
CVE-2026-84319

8.3HIGH

Key Information:

Vendor

0xjacky

Status
Nginx-ui
Vendor
CVE Published:
12 October 2026

What is CVE-2026-84319?

Nginx UI, a web user interface for the Nginx web server, contains a vulnerability where the regular HTTP configuration API restricts certain directives. However, the MCP configuration interface fails to enforce similar restrictions for secondary authenticated users. This flaw allows these users to write and apply restricted configurations, including loading unsafe modules and executing attacker-controlled JavaScript within the Nginx worker context. The issue was addressed in version 2.4.1.

Affected Version(s)

nginx-ui < 2.4.1

References

https://github.com/0xJacky/nginx-ui/security/advisories/G...
x_refsource_CONFIRM
https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b...
x_refsource_MISC
https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1
x_refsource_MISC

CVSS V3.1

Score:
8.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.