Missing Authorization in nginx-ui - #VU142591
Published: August 14, 2026
Vulnerability identifier: #VU142591
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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 authentication and perform administrative actions on remote cluster nodes.
The vulnerability exists due to missing authorization in the node-secret authentication middleware when processing requests with a leaked X-Node-Secret header or node_secret query parameter. A remote user can send a request with a valid node secret to bypass authentication and perform administrative actions on remote cluster nodes.
The middleware maps requests with a matching node secret directly to initUser, enabling cross-node impersonation after obtaining a cluster node token.
Affected software
nginx-ui
Remediation
Install security update from vendor's website.
nginx-ui - update to 2.5.0