{"action":"Upgrade next to 12.3.5 or later.","affected":[{"fixed":"13.5.9","introduced":"13.0.0"},{"fixed":"14.2.25","introduced":"14.0.0"},{"fixed":"15.2.3","introduced":"15.0.0"},{"fixed":"12.3.5","introduced":"12.0.0"}],"component":"next","cve_ids":["CVE-2025-29927"],"ecosystem":"npm","epss":0.99225,"exploited":false,"fixed_versions":["13.5.9","14.2.25","15.2.3","12.3.5"],"ghsa_id":"GHSA-f82v-jwr5-mffw","id":"tcs_01M5KFMYC8AG280P8P438Q6996","modified_at":"2026-09-10T03:50:23.209773204Z","published_at":"2025-03-21T15:20:12Z","references":["https://osv.dev/vulnerability/GHSA-f82v-jwr5-mffw","https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw","https://nvd.nist.gov/vuln/detail/CVE-2025-29927","https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2","https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48","https://github.com/vercel/next.js","https://github.com/vercel/next.js/releases/tag/v12.3.5","https://github.com/vercel/next.js/releases/tag/v13.5.9","https://security.netapp.com/advisory/ntap-20250328-0002","https://vercel.com/changelog/vercel-firewall-proactively-protects-against-vulnerability-with-middleware","http://www.openwall.com/lists/oss-security/2025/03/23/3","http://www.openwall.com/lists/oss-security/2025/03/23/4"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"GHSA-f82v-jwr5-mffw","url":"https://osv.dev/vulnerability/GHSA-f82v-jwr5-mffw"}],"summary":"Authorization Bypass in Next.js Middleware"}