{"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-2026-64646"],"ecosystem":"npm","epss":0.00524,"exploited":false,"fixed_versions":["15.5.21","16.2.11"],"ghsa_id":"GHSA-4c39-4ccg-62r3","id":"tcs_01M5KF02HBH14F1T0NN8HB9GF4","modified_at":"2026-09-10T03:50:51.398762372Z","published_at":"2026-07-22T23:02:43Z","references":["https://osv.dev/vulnerability/GHSA-4c39-4ccg-62r3","https://github.com/vercel/next.js/security/advisories/GHSA-4c39-4ccg-62r3","https://github.com/vercel/next.js/commit/57c31f724d746e86a9e8b92aa8be538a922446a4","https://github.com/vercel/next.js/commit/9a4651e754f70b12e397694ffc41f44c3ba8cc17","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"},"sources":[{"source":"osv","source_id":"GHSA-4c39-4ccg-62r3","url":"https://osv.dev/vulnerability/GHSA-4c39-4ccg-62r3"}],"summary":"Next.js: Unbounded Server Action payload in Edge runtime"}