CVE-2025-57822 MEDIUM

CVE-2025-57822: Next.js Improper Middleware Redirect Handling Leads to SSRF

Vendor Vercel
Product next.js
Weakness CWE-918 · SSRF
Published August 29, 2025
Last update September 2, 2025

CVSS base score

6.5/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

Next.js is a React framework for building full-stack web applications. Prior to versions 14.2.32 and 15.4.7, when next() was used without explicitly passing the request object, it could lead to SSRF in self-hosted applications that incorrectly forwarded user-supplied headers. This vulnerability has been fixed in Next.js versions 14.2.32 and 15.4.7. All users implementing custom middleware logic in self-hosted environments are strongly encouraged to upgrade and verify correct usage of the next() function.

Key dates

02Disclosure timeline

August 29, 2025 CVE published
September 2, 2025 Record updated