CVE-2026-44578

Next.js: Server-side request forgery in applications using WebSocket upgrades

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.

Scores

Faiblesses (CWE)

• CWE-918

Avis

• GHSA-c4j6-fc7j-m34r — Next.js vulnerable to server-side request forgery in applications using WebSocket upgrades

Références européennes

• ENISA EUVD · EUVD-2026-30080
• GCVE · GCVE-0-2026-44578

Avis du CERT-FR

• CERTFR-2026-AVI-1256 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
• CERTFR-2026-AVI-0901 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

• cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* ≥ 13.4.13 < 15.5.16
• cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* ≥ 16.0.0 < 16.2.5

Produits affectés

Références

• https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r
• https://access.redhat.com/security/cve/CVE-2026-44578
• https://bugzilla.redhat.com/show_bug.cgi?id=2477187
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44578.json
• https://access.redhat.com/errata/RHSA-2026:40974
• https://access.redhat.com/errata/RHSA-2026:37272
• https://access.redhat.com/errata/RHSA-2026:34608
• https://access.redhat.com/errata/RHSA-2026:54435

Sources