{"id":"GHSA-vfv6-92ff-j949","revision":"67e5ab32eb374e69b343388953ca090b","records":[{"revision":"67e5ab32eb374e69b343388953ca090b","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-vfv6-92ff-j949","aliases":["CVE-2026-44582"],"title":"Next.js vulnerable to cache poisoning via collisions in React Server Component cache-busting","description":"### Impact\n\nReact Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficient response partitioning. In affected conditions, collisions in the `_rsc` cache-busting value can allow an attacker to poison cache entries so users receive the wrong response variant for a given URL.\n\n### Fix\n\nWe strengthened the `_rsc` cache-busting mechanism to make practical collisions significantly harder and to better separate response variants that should not share cache entries.\n\n### Workarounds\n\nIf you cannot upgrade immediately, ensure intermediary caches correctly honor `Vary` for RSC-related request headers, or disable shared caching for affected RSC responses until you can deploy a patched release.","state":0,"publishedAt":"2026-05-11T15:56:48+00:00","modifiedAt":"2026-09-10T03:50:47.6607865+00:00","affected":[{"ecosystem":"npm","name":"next","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"13.4.6"},{"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:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-vfv6-92ff-j949","https://nvd.nist.gov/vuln/detail/CVE-2026-44582","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-vfv6-92ff-j949","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-vfv6-92ff-j949","identifiers":["GHSA-vfv6-92ff-j949","CVE-2026-44582"]},"retained":false,"historicalAffected":[]}],"coverage":[]}