Security vulnerabilities and automated fixes for middleware issues
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A critical middleware and proxy bypass vulnerability (CVE-2026-64642) was discovered in Next.js 16.0.7 when using the App Router with Turbopack and single locale configurations. This vulnerability could allow attackers to circumvent security middleware and access protected routes. The fix requires upgrading Next.js from version 16.0.7 to 16.2.11, which patches the routing logic that handles locale-based request interception.