Vulnerability · Published May 12, 2026 · Assigned by GitHub_M

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

High 8.5

In plain English

A high-severity server-side request forgery in nginx-ui from 0xJacky. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 3.1)8.5High

Exploit odds (30 days)0.3%top 75.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/0xJacky/Nginx-UI	no fix listed	GHSA-wr32-99hh-6f35
Go	github.com/0xJacky/Nginx-UI	no fix listed	GO-2026-5719

Affected products (as reported)

Vendor	Product	Versions
0xJacky	nginx-ui	<= 2.3.4

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References

https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-wr32-99hh-6f35 x_refsource_CONFIRM