CVE-2026-42222

CRITICAL CVSS 3.1: 9.8 EPSS 0.34%
Updated Jun 17, 2026
Nginxui
Parameter Value
CVSS 9.8 (CRITICAL)
Type CWE-284 (Improper Access Control), CWE-306 (Missing Authentication for Critical Function)
Vendor Nginxui
Public PoC No

Nginx UI is a web user interface for the Nginx web server. In version 2.3.5, an unauthenticated bootstrap takeover exists in nginx-ui during the initial installation window exposed by POST /api/install. At time of publication no public patches are available.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Nginxui Nginx_Ui
cpe:2.3:a:nginxui:nginx_ui:2.3.5:*:*:*:*:*:*:*