Missing Authorization in nginx-ui - #VU157118
Published: October 22, 2026
Vulnerability identifier: #VU157118
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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 initiate a binary self-upgrade without completing the required OTP secure-session step-up.
The vulnerability exists due to missing authorization in the core-upgrade websocket route in api/system/router.go when handling upgrade requests. A remote user can access upgrade/perform using a valid JWT without a fresh secure session to invoke PerformCoreUpgrade and initiate a binary self-upgrade.
The core-upgrade websocket route rejects requests in demo mode.
Affected software
nginx-ui
Remediation
Install security update from vendor's website.
nginx-ui - update to 2.9.0