Authorization bypass through user-controlled key in nginx-ui - CVE-2026-33030
Published: April 23, 2026
Vulnerability identifier: #VU127227
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33030
CWE-ID: CWE-639
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Nginx UI
Affected software:
nginx-ui
nginx-ui
Detailed vulnerability description
The vulnerability allows a local user to access, modify, and delete other users' resources.
The vulnerability exists due to authorization bypass through user-controlled key in resource endpoints when handling requests for resources by ID without verifying user ownership. A local user can enumerate and request another user's resource identifier to access, modify, and delete other users' resources.
In multi-user environments, exposed resources may include plaintext DNS API tokens and ACME private keys.
How to mitigate CVE-2026-33030
Install security update from vendor's website.