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Server-Side Request Forgery (SSRF) in next

CVE-2026-64649

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High
8.3/10

Summary

When a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host (Server-Side Request Forgery). This requires the attacker to control Host-associated headers. In some configurations, it's also possible to obtain internal values that weaken middleware/proxy authorization. Affected versions are from 14.1.1 prior to 15.5.21 and from 16.0.0 prior to 16.2.11.

  • LOW
  • NETWORK
  • NONE
  • NONE

CWE-918 - Server-Side Request Forgery (SSRF)

Server-side request forgery (SSRF) is a weakness that allows an attacker to send an arbitrary request, making it appear that the request was sent by the server. This request may bypass a firewall that would normally prevent direct access to the URL. The impact of this vulnerability can vary from unauthorized access to files and sensitive information to remote code execution.

References

Advisory Timeline

  • Published