{"id":"CVE-2026-44572","revision":"a63144d53a40406f8b99dc11f879d09c","records":[{"revision":"a63144d53a40406f8b99dc11f879d09c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44572","aliases":[],"title":"Next.js: Middleware / Proxy redirects can be cache-poisoned","description":"Next.js is a React framework for building full-stack web applications. From 12.2.0 to before 15.5.16 and 16.2.5, an external client could send a x-nextjs-data header on a normal request to a path handled by middleware that returns a redirect. When that happened, the middleware/proxy could treat the request as a data request and replace the standard Location redirect header with the internal x-nextjs-redirect header. Browsers do not follow x-nextjs-redirect, so the response became an unusable redirect for normal clients. If the application was deployed behind a CDN or reverse proxy that caches 3xx responses without varying on this header, a single attacker request could poison the cached redirect response for the affected path. Subsequent visitors could then receive a cached redirect response without a Location header, causing a denial of service for that redirect path until the cache entry expired or was purged. This vulnerability is fixed in 15.5.16 and 16.2.5.","state":0,"publishedAt":"2026-05-13T15:57:15.75+00:00","modifiedAt":"2026-05-14T15:33:10.541+00:00","affected":[{"ecosystem":"Vendor product","name":"next.js","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"vercel\",\n                    \"product\": \"next.js\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 12.2.0, < 15.5.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 16.0.0, < 16.2.5\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","score":3.7,"severity":"LOW"}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-3g8h-86w9-wvmq"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44572","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44572","identifiers":["CVE-2026-44572"]},"retained":false,"historicalAffected":[]}],"coverage":[]}