{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-44572", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-06T21:49:12.424Z", "datePublished": "2026-05-13T15:57:15.750Z", "dateUpdated": "2026-05-13T15:57:15.750Z"}, "containers": {"cna": {"title": "Next.js: Middleware / Proxy redirects can be cache-poisoned", "problemTypes": [{"descriptions": [{"cweId": "CWE-349", "lang": "en", "description": "CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/vercel/next.js/security/advisories/GHSA-3g8h-86w9-wvmq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/vercel/next.js/security/advisories/GHSA-3g8h-86w9-wvmq"}], "affected": [{"vendor": "vercel", "product": "next.js", "versions": [{"version": ">= 12.2.0, < 15.5.16", "status": "affected"}, {"version": ">= 16.0.0, < 16.2.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-13T15:57:15.750Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-3g8h-86w9-wvmq", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-44572", "lastModified": "2026-05-13T16:58:40.557", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-13T16:16:58.800", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/vercel/next.js/security/advisories/GHSA-3g8h-86w9-wvmq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-349"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[12.2.0,15.5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[16.0.0,16.2.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "next.js", "source": "cna", "vendor": "vercel"}, "product": "next.js", "vendor": "vercel"}], "created": "2026-05-13T18:15:16.576859+00:00", "updated": "2026-05-13T18:45:36.225233+00:00", "vendors": ["vercel", "vercel$PRODUCT$next.js"]}