{"id":"GHSA-68g3-v927-f742","revision":"6fde08aee66b44798fcda3bb417314bb","records":[{"revision":"6fde08aee66b44798fcda3bb417314bb","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-68g3-v927-f742","aliases":["CVE-2026-64648"],"title":"Next.js: Cache confusion of response bodies for requests with bodies","description":"## Impact\n\nA server-side `fetch` with a request body may return a cached **response** body from a different request to the same URL but different body. Confidential data in the `POST`'s **response** body would then leak to unauthorized requests. Though the request itself will not be deduped.\n\nThis only applies to `fetch` calls with a request that has a different init than the one passed to `fetch`.\nSafe: `fetch(new Request(init), init)`\nUnsafe: `fetch(new Request(init), aDifferentInit)`\n\n## Workarounds\n\nNo workaround exists besides upgrading. Applications using Pages Router are not vulnerable.","state":0,"publishedAt":"2026-07-22T23:08:17+00:00","modifiedAt":"2026-09-10T03:51:10.5879866+00:00","affected":[{"ecosystem":"npm","name":"next","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"13.0.0"},{"kind":"fixed","version":"15.5.21"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"next","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"16.0.0"},{"kind":"fixed","version":"16.2.11"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-68g3-v927-f742","https://github.com/vercel/next.js/commit/062f66700b52a5d6bba2c0605d55577ab7ad262c","https://github.com/vercel/next.js/commit/73b94872bc343d09494b50394d8c08eb9fc8e56a","https://github.com/vercel/next.js","https://github.com/vercel/next.js/releases/tag/v15.5.21","https://github.com/vercel/next.js/releases/tag/v16.2.11"],"sourceUrl":"https://github.com/advisories/GHSA-68g3-v927-f742","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-68g3-v927-f742","identifiers":["GHSA-68g3-v927-f742","CVE-2026-64648"]},"retained":false,"historicalAffected":[]}],"coverage":[]}