p PatchFirst

CVE-2026-44578

CVE-2026-44578 · Next.js: Server-side request forgery in applications using WebSocket upgrades

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.6 · High · EPSS 1.9% · Public exploit · Fix available

Published
Updated

Stack: node

Affected products and versions

  • next.js

    Versions
    • >= 16.0.0, < 16.2.5: Affected
    • >= 13.4.13, < 15.5.16: Affected

    No fix published

  • next npm

    Affected ranges
    • SEMVER: ≥ 13.4.13, < 15.5.16

    Update to 15.5.16

  • next npm

    Affected ranges
    • SEMVER: ≥ 16.0.0, < 16.2.5

    Update to 16.2.5

Original sources

Check your server →