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CVE PROGRAM SOURCE RECORD8.3 High

CVE-2026-64642

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

vercel next.js

  • >= 16.0.0, < 16.2.11affected

References