{"id":"CVE-2026-44579","revision":null,"records":[{"revision":"01cb15d509584a14bf1c7bec923572da","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44579","aliases":[],"title":"Next.js: Denial of Service via connection exhaustion in applications using Cache Components","description":"Next.js is a React framework for building full-stack web applications. From  to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service. 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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-2026-30081","identifiers":["EUVD-2026-30081","CVE-2026-44579","GHSA-mg66-mrh9-m8jx"]},"retained":false,"historicalAffected":[]},{"revision":"c7b542a4007f4c00933a36a136c41909","observedAt":"2026-10-27T11:12:17.434+00:00","statement":{"source":"nvd","id":"CVE-2026-44579","aliases":[],"title":"Next.js is a React framework for building full-stack web applications. From  to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through craft…","description":"Next.js is a React framework for building full-stack web applications. From  to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service. This vulnerability is fixed in 15.5.16 and 16.2.5.","state":0,"publishedAt":"2026-05-13T18:16:18.123+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:U/C:N/I:N/A:H","score":7.5,"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:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-mg66-mrh9-m8jx","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-2026-44579","https://bugzilla.redhat.com/show_bug.cgi?id=2477193","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44579.json"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44579","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-770","CWE-833"],"productCriteria":["cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-05-13T18:16:18.123","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-2026-44579","identifiers":["CVE-2026-44579"]},"retained":false,"historicalAffected":[]},{"revision":"bc250b30ac634fe8aa495c0dff3605c6","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-mg66-mrh9-m8jx","aliases":["CVE-2026-44579"],"title":"Next.js vulnerable to Denial of Service via connection exhaustion in applications using Cache Components","description":"### Impact\n\nApplications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service.\n\n### Fix\n\nWe now treat the header used for resuming Partial Prerendered requests as an internal-only header and strip it from untrusted incoming requests. This header should never be accepted directly from external clients.\n\n### Workarounds\n\nIf you cannot upgrade immediately, block requests that would be handled by Next.js if they contain the `Next-Resume` header at the edge.","state":0,"publishedAt":"2026-05-11T15:56:24+00:00","modifiedAt":"2026-09-10T03:51:06.38907+00:00","affected":[{"ecosystem":"npm","name":"next","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"15.0.0"},{"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:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-mg66-mrh9-m8jx","https://nvd.nist.gov/vuln/detail/CVE-2026-44579","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-mg66-mrh9-m8jx","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-mg66-mrh9-m8jx","identifiers":["GHSA-mg66-mrh9-m8jx","CVE-2026-44579"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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