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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0263
Server Side Request Forgery Vulnerability in Next.js

Original Issue Date:May 25, 2026

Severity Rating: HIGH

Software Affected

  • Next.js versions from 13.4.13 before 15.5.16
  • Next.js versions 16 before 16.2.5

Overview

A vulnerability has been reported in Next.js which could allow an attacker to proxy requests to arbitrary destinations leading to exposure of internal services or cloud metadata endpoints.

Target Audience:
All end-user individuals and organizations using Next.js.

Risk Assessment:
High risk of unauthorized access to sensitive information.

Impact Assessment:
Potential exposure of internal services or cloud metadata endpoints.

Description

Next.js is an open source React framework developed by Vercel for building full-stack web applications with features like server-side rendering, static site generation, API routes, and optimized performance.

A server-side request forgery (SSRF) vulnerability has been identified in Next.js which affects self-hosted applications that use the built-in Node.js server. An attacker could exploit this vulnerability by sending specially crafted WebSocket upgrade requests.

Successful exploitation of this vulnerability could allow an attacker to proxy requests to arbitrary destinations leading to exposure of internal services or cloud metadata endpoints.

Solution

Apply appropriate updates or workarounds as mentioned by the vendor:
https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r

Vendor Information

Next.js
https://github.com/vercel/next.js/security

References

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

CVE Name
CVE-2026-44578

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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