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CVE-2026-33026

CRITICAL CVSS 4.0: 9.4 EPSS 0.01%
Updated Apr 01, 2026
Nginx
Parameter Value
CVSS 9.4 (CRITICAL)
Affected Versions before 2.3.4
Fixed In 2.3.4
Type CWE-347 (Improper Verification of Cryptographic Signature), CWE-312, CWE-354
Vendor Nginx
Public PoC No

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This issue has been patched in version 2.3.4.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin 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 v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Nginxui Nginx_Ui
cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*
2.3.4