CVE-2026-44015: Nginxui Nginx UI

Critical severity, CVSS 9.9. EPSS: 0.4% chance of exploitation in the next 30 days.

Nginx UI is a web user interface for the Nginx web server. In 2.3.4 and earlier, an authenticated user can perform Server-Side Request Forgery (SSRF) by creating a cluster node pointing to an arbitrary internal URL and then sending API requests with the X-Node-ID header. The Proxy middleware forwards these requests to the attacker-specified internal address, bypassing network segmentation and enabling access to services bound to localhost or internal networks.

Affected products

• Nginxui Nginx UI: up to and including 2.3.4

Published 2026-05-12. Last modified 2026-06-17.