Origin validation error in nginx-ui - #VU152971
Published: September 30, 2026
Vulnerability identifier: #VU152971
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-346
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to origin validation error in the bundled reverse-proxy client identity handling when processing failed login attempts. A remote attacker can submit failed login attempts from different external sources to cause a denial of service.
Existing authenticated sessions are not invalidated.
Affected software
nginx-ui
Remediation
Install security update from vendor's website.
nginx-ui - update to 2.6.0