GHSA-4342-x723-ch2f
GitHub Security Advisory
Next.js Improper Middleware Redirect Handling Leads to SSRF
✓ GitHub Reviewed
MODERATE
Has CVE
Advisory Details
A vulnerability in **Next.js Middleware** has been fixed in **v14.2.32** and **v15.4.7**. The issue occurred when request headers were directly passed into `NextResponse.next()`. In self-hosted applications, this could allow Server-Side Request Forgery (SSRF) if certain sensitive headers from the incoming request were reflected back into the response.
All users implementing custom middleware logic in self-hosted environments are strongly encouraged to upgrade and verify correct usage of the `next()` function.
More details at [Vercel Changelog](https://vercel.com/changelog/cve-2025-57822)
Affected Packages
npm
next
Affected versions:
0
(fixed in 14.2.32)
npm
next
Affected versions:
15.0.0-canary.0
(fixed in 15.4.7)
Related CVEs
Key Information
5.0
/10
Dataset
Last updated: September 10, 2025 6:31 AM
Data from GitHub Advisory Database. This information is provided for research and educational purposes.