CVE-2025-30218

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://github.com/vercel/next.js/security/advisories/GHSA-223j-4rm8-mrmf", "name": "https://github.com/vercel/next.js/security/advisories/GHSA-223j-4rm8-mrmf", "tags": [], "refsource": ""}, {"url": "https://vercel.com/changelog/cve-2025-30218-5DREmEH765PoeAsrNNQj3O", "name": "https://vercel.com/changelog/cve-2025-30218-5DREmEH765PoeAsrNNQj3O", "tags": [], "refsource": ""}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-200"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2025-30218", "ASSIGNER": "security-advisories@github.com"}}, "impact": {}, "publishedDate": "2025-04-02T22:15Z", "configurations": {"nodes": [], "CVE_data_version": "4.0"}, "lastModifiedDate": "2025-04-02T22:15Z"}