What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-05-12 · updated 2026-10-26
• Weakness: CWE-918

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 products

• 0xJacky nginx-ui: through 2.3.4

References

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

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