CVE-2026-44015: Nginx-UI has Server-Side Request Forgery (SSRF) via Cluster Proxy Middleware that Allows Access to Internal Services

April 29, 2026 (updated May 8, 2026)

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.

References

github.com/0xJacky/nginx-ui
github.com/0xJacky/nginx-ui/security/advisories/GHSA-wr32-99hh-6f35
github.com/advisories/GHSA-wr32-99hh-6f35
nvd.nist.gov/vuln/detail/CVE-2026-44015

Code Behaviors & Features

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