CVE-2025-57822

Next.js Improper Middleware Redirect Handling Leads to SSRF

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.

Affected

vercel · next.js

CVSS v3.1 NVD

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

CVSS v3.1 GITHUB

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

EPSS

2.58% chance of exploitation in the next 30 days, 85th percentile

Nuclei

medium · CWE-918

Published

2025-08-29

Updated

2025-09-02

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-57822.yaml

Security advisories

• vercel/next.js/security/advisories/GHSA-4342-x723-ch2f
• https://vercel.com/changelog/cve-2025-57822
• advisories/GHSA-4342-x723-ch2f
• vercel/next.js/commit/9c9aaed5bb9338ef31b0517ccf0ab4414f2093d8

References

• CVE Record
• NVD entry