Critical Next.js RCE: Malicious AVIF Images Expose Servers to Remote Code Execution

🚨 Critical Next.js RCE: malicious AVIF/HEIC images can trigger unauthenticated remote code execution through the Image Optimization API. The attack chain involves Next.js → sharp → libvips → libheif, with a critical heap buffer overflow tracked as GHSA-g89c-p67h-r497. Also patched: CVE-2026-75604, a separate critical Windows-hosted Next.js RCE.