{"action":"Upgrade next to 15.5.21 or later.","affected":[{"fixed":"15.5.21","introduced":"13.0.0"},{"fixed":"16.2.11","introduced":"16.0.0"}],"component":"next","cve_ids":["CVE-2026-64647"],"ecosystem":"npm","epss":0.00317,"exploited":false,"fixed_versions":["15.5.21","16.2.11"],"ghsa_id":"GHSA-4633-3j49-mh5q","id":"tcs_01M5KEZG18T3W8FJCA4RXZVNBH","modified_at":"2026-09-10T03:50:51.390157243Z","published_at":"2026-07-22T23:06:12Z","references":["https://osv.dev/vulnerability/GHSA-4633-3j49-mh5q","https://github.com/vercel/next.js/security/advisories/GHSA-4633-3j49-mh5q","https://github.com/vercel/next.js/pull/96008","https://github.com/vercel/next.js/commit/025bf4a5f7b47fb7758c4ebf1c931a61c451c082","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"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"GHSA-4633-3j49-mh5q","url":"https://osv.dev/vulnerability/GHSA-4633-3j49-mh5q"},{"source":"nvd","source_id":"CVE-2026-64647","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64647"}],"summary":"Next.js: Cache confusion of response bodies for requests with bodies containing invalid UTF-8 byte sequences"}