CVE-2025-29927: Next.js Middleware Authorization Bypass
Next.js is an open-source web framework built by Vercel that powers React-based apps with features like server-side and static rendering. Recently, a critical vulnerability (CVE) was disclosed that lets attackers bypass middleware-based authorization checks. The issue was originally discovered and analyzed by Rachid Allam (zhero). In this blog, we’ll break down the vulnerability and walk through their research and will create a Nuclei template to help you detect it across your assets.
