CVE-2026-44578

Description

Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. This vulnerability is fixed in 15.5.16 and 16.2.5.

PUBLISHED Reserved 2026-05-06 | Published 2026-05-13 | Updated 2026-05-13 | Assigner GitHub_M

Problem types

CWE-918: Server-Side Request Forgery (SSRF)

Product status

References

github.com/...ext.js/security/advisories/GHSA-c4j6-fc7j-m34r

cve.org (CVE-2026-44578)

nvd.nist.gov (CVE-2026-44578)

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