Missing Authorization in nginx-ui - #VU157120
Published: October 22, 2026
Vulnerability identifier: #VU157120
CSH Severity: Medium
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass secure-session step-up authentication to modify sensitive configuration, access management data, and disrupt NGINX services on a registered peer node.
The vulnerability exists due to missing authorization checks in the nginx-ui controller's node-proxy middleware when forwarding requests before route-specific secure-session checks execute. A remote user can add an X-Node-ID header identifying a registered peer to a request carrying a valid user JWT to invoke sensitive peer-node operations without fresh OTP or passkey verification, because the peer accepts the forwarded request as a trusted node principal.
Affected software
nginx-ui
Remediation
Install security update from vendor's website.
nginx-ui - update to 2.9.0