CVE-2026-64642: Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
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.
References
- github.com/advisories/GHSA-6gpp-xcg3-4w24
- github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151
- github.com/vercel/next.js/pull/96014
- github.com/vercel/next.js/releases/tag/v16.2.11
- github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24
- nvd.nist.gov/vuln/detail/CVE-2026-64642
Code Behaviors & Features
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