GHSA-4342-x723-ch2f
Next.js Improper Middleware Redirect Handling Leads to SSRF
Quick fix
GHSA-4342-x723-ch2f — next: upgrade to the fixed version with the command below.
npm install next@14.2.32Details
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)
Are you affected?
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Affected packages
References
- https://github.com/vercel/next.js/security/advisories/GHSA-4342-x723-ch2f[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2025-57822[ADVISORY]
- https://github.com/vercel/next.js/commit/9c9aaed5bb9338ef31b0517ccf0ab4414f2093d8[WEB]
- https://github.com/vercel/next.js[PACKAGE]
- https://vercel.com/changelog/cve-2025-57822[WEB]