#VU126634 Origin validation error in nginx-ui - CVE-2026-34403

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU126634

#VU126634 Origin validation error in nginx-ui - CVE-2026-34403

Published: April 21, 2026 / Updated: April 21, 2026


Vulnerability identifier: #VU126634
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2026-34403
CWE-ID: CWE-346
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
nginx-ui
Software vendor:
Nginx UI

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the Cross-Site WebSocket Hijacking (CSWSH) issue within missing origin validation on all WebSocket endpoints. A remote attacker can gain access to sensitive information on the system, leading to arbitrary code execution.


Remediation

Install updates from vendor's website.

External links