{"id":"CVE-2026-44578","revision":null,"records":[{"revision":"9a72bf893838447d84e0be40245ff702","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44578","aliases":[],"title":"Next.js: Server-side request forgery in applications using WebSocket upgrades","description":"Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. 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Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-30080","identifiers":["EUVD-2026-30080","CVE-2026-44578","GHSA-c4j6-fc7j-m34r"]},"retained":false,"historicalAffected":[]},{"revision":"226fb579dab4407aa21275f884219956","observedAt":"2026-10-27T11:12:17.434+00:00","statement":{"source":"nvd","id":"CVE-2026-44578","aliases":[],"title":"Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted We…","description":"Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. This vulnerability is fixed in 15.5.16 and 16.2.5.","state":0,"publishedAt":"2026-05-13T18:16:17.99+00:00","modifiedAt":"2026-10-26T14:10:00.13+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6,"severity":"HIGH"},{"system":"CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6,"severity":"HIGH"}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r","https://access.redhat.com/errata/RHSA-2026:34608","https://access.redhat.com/errata/RHSA-2026:37272","https://access.redhat.com/errata/RHSA-2026:40974","https://access.redhat.com/errata/RHSA-2026:54435","https://access.redhat.com/security/cve/CVE-2026-44578","https://bugzilla.redhat.com/show_bug.cgi?id=2477187","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44578.json"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44578","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-918"],"productCriteria":["cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-05-13T18:16:17.990","lastModified":"2026-10-26T14:10:00.130"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-44578","identifiers":["CVE-2026-44578"]},"retained":false,"historicalAffected":[]},{"revision":"630a3e5369e64b309b152b4ae2efba14","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-c4j6-fc7j-m34r","aliases":["CVE-2026-44578"],"title":"Next.js vulnerable to server-side request forgery in applications using WebSocket upgrades","description":"### Impact\n\nSelf-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected.\n\n### Fix\n\nWe now apply the same safety checks to WebSocket upgrade handling that already existed for normal HTTP requests, so upgrade requests are only proxied when routing has explicitly marked them as safe external rewrites.\n\n### Workarounds\n\nIf you cannot upgrade immediately, do not expose the origin server directly to untrusted networks. If WebSocket upgrades are not required, block them at your reverse proxy or load balancer, and restrict origin egress to internal networks and metadata services where possible.","state":0,"publishedAt":"2026-05-11T15:55:15+00:00","modifiedAt":"2026-09-10T03:50:46.4992748+00:00","affected":[{"ecosystem":"npm","name":"next","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"13.4.13"},{"kind":"fixed","version":"15.5.16"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"next","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"16.0.0"},{"kind":"fixed","version":"16.2.5"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r","https://nvd.nist.gov/vuln/detail/CVE-2026-44578","https://github.com/vercel/next.js","https://github.com/vercel/next.js/releases/tag/v15.5.16","https://github.com/vercel/next.js/releases/tag/v16.2.5"],"sourceUrl":"https://github.com/advisories/GHSA-c4j6-fc7j-m34r","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-c4j6-fc7j-m34r","identifiers":["GHSA-c4j6-fc7j-m34r","CVE-2026-44578"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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