CVE-2025-30218 - Next.js Cross-Origin Request Exposure

CVE ID : CVE-2025-30218
Published : April 2, 2025, 10:15 p.m. | 39 minutes ago
Description : Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host as the Next.js application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4.
Severity: 0.0 | NA
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