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CVE CVE-2026-44578

CVE-2026-44578

Node.jsNext.jsReact

Severity: HIGH
CVSS: 8.6CVSS
Published: 2026-05-13
Last modified: 2026-05-13
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE: CWE-918

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.

References

https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r

Summary

Description

References