CVE-2025-57822
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Vercel Next.js
PublishedAug 29, 2025
First seenAug 29, 2025
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- vercel next.js14.2.32, 15.4.7 or later
- next14.2.32, 15.4.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vercel next.js | v < 14.2.32, 15.0.0 ≤ v < 15.4.7 | 14.2.32, 15.4.7 |
| nextnpm | 0.9.9 ≤ v < 14.2.32, 15.0.0-canary.0 ≤ v < 15.4.7 | 14.2.32, 15.4.7 |
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