{"id":"CVE-2026-64642","aliases":["EUVD-2026-49382","GHSA-6gpp-xcg3-4w24","ROOT-APP-NPM-CVE-2026-64642"],"status":"published","title":"Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale","description":"Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.","severity":{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00635,"percentile":0.50726,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-285"],"published":"2026-07-22T22:59:38Z","modified":"2026-10-28T03:01:14Z","fixes":[{"ecosystem":"npm","package":"next","fixed_in":["16.2.11"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"next","fixed_in":["16.2.11-aikido.1","16.2.11-aikido.2"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/next","fixed_in":["16.2.11-root.io.1","16.2.11-root.io.2"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"next","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"16.0.0"},{"fixed":"16.2.11"}]}]},{"source":"osv","ecosystem":"npm","package":"next","ranges":[{"type":"SEMVER","events":[{"introduced":"16.0.0"},{"fixed":"16.2.11"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"next","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"16.2.11-aikido.1"},{"fixed":"16.2.11-aikido.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/next","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"16.2.11-root.io.1"},{"fixed":"16.2.11-root.io.2"}]}]}],"products":[{"vendor":"vercel","product":"next.js"}],"references":[{"url":"https://github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://github.com/vercel/next.js/pull/96014","tags":["x_refsource_MISC","Issue Tracking","Patch","fix","web"]},{"url":"https://github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/vercel/next.js/releases/tag/v16.2.11","tags":["x_refsource_MISC","Product","Release Notes","web"]},{"url":"https://github.com/advisories/GHSA-6gpp-xcg3-4w24"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64642.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64642","tags":["advisory"]},{"url":"https://github.com/vercel/next.js","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-64642","title":"Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale","description":"Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.","status":"published","published":"2026-07-27T17:45:40.761Z","modified":"2026-07-28T15:20:33.639Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:19:58.214427Z"}],"euvd":[{"id":"EUVD-2026-49382","description":"Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.","status":"published","published":"2026-07-27T17:45:40Z","modified":"2026-07-28T15:20:33Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:02:31.399718Z"}],"ghsa":[{"id":"GHSA-6gpp-xcg3-4w24","title":"Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale","description":"## Impact\n\nCrafted requests targeting Next.js applications using App Router built with Turbopack and a **single** entry in `config.i18n.locales` can bypass middleware/proxy based authentication.\n\n## Workarounds\n\nIf you cannot upgrade immediately, enforce authorization in the page's server-side data path instead of relying solely on middleware.","status":"published","published":"2026-07-22T22:59:38Z","modified":"2026-07-22T22:59:39Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:40:51.375752Z"}],"nvd":[{"id":"CVE-2026-64642","description":"Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.","status":"published","published":"2026-07-27T18:16:59.01Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:12:33.249634Z"}],"osv":[{"id":"CVE-2026-64642","title":"Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale","description":"Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.","status":"published","published":"2026-07-27T17:45:40.761Z","modified":"2026-10-28T03:01:14.819257673Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T15:45:14.096824Z"},{"id":"GHSA-6gpp-xcg3-4w24","title":"Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale","description":"## Impact\n\nCrafted requests targeting Next.js applications using App Router built with Turbopack and a **single** entry in `config.i18n.locales` can bypass middleware/proxy based authentication.\n\n## Workarounds\n\nIf you cannot upgrade immediately, enforce authorization in the page's server-side data path instead of relying solely on middleware.","status":"published","published":"2026-07-22T22:59:38Z","modified":"2026-09-10T03:51:10.700589078Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T15:46:39.618611Z"},{"id":"ROOT-APP-NPM-CVE-2026-64642","title":"CVE-2026-64642 in next - Patched by Root","description":"Root has patched CVE-2026-64642 in the next package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-12T12:08:55Z","modified":"2026-10-12T13:15:06.714351391Z","updated_at":"2026-11-02T15:53:27.649662Z"}]}}