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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0394
Server-Side Request Forgery (SSRF) Vulnerability in Next.js

Original Issue Date:August 06, 2026

Severity Rating: HIGH

Software Affected

  • Next.js version 12.0.0 or higher and prior to 15.5.21
  • Next.js version 16.0.0 or higher and prior to 16.2.11

Overview

A Server-Side Request Forgery (SSRF) vulnerability exists in the Next.js framework. An unauthenticated remote attacker may exploit this vulnerability to cause the server to issue requests to arbitrary internal or external hosts or perform Open Redirect attacks.

Target Audience:
Organizations developing or hosting web applications using the Next.js framework.

Risk Assessment:
High risk of unauthorized access to internal network resources and disclosure of sensitive information.

Impact Assessment:
Potential High impact on Confidentiality of the System.

Description

Next.js is a React-based web application framework used for building server-rendered and full-stack web applications. Next.js framework is affected by the Server-Side Request Forgery (SSRF) vulnerability.

This vulnerability exists due to improper validation of request-controlled inputs during the processing of rewrites() and redirects() configuration rules where destination hostname is dynamically generated from request-controlled inputs.

An unauthenticated remote attacker could exploit this vulnerability by sending specially crafted requests that manipulate the destination hostname to an arbitrary host instead of the intended destination.

Successful exploitation could allow the attacker to perform Server-Side Request Forgery (SSRF), resulting in unauthorized access to internal or external network resources in applications using the affected rewrites() configurations, or perform Open Redirect attacks in applications using the affected redirects() configurations.

Solution

Apply appropriate Updates and steps as mentioned by the vendor:
https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4

Vendor Information

 
https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4

References

 
https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4

CVE Name
CVE-2026-64645

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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