Next.js Security Update for Upstream Vulnerabilities
Next.js released v16.4.1 and v15.5.28 to fix two critical unauthenticated remote code execution vulnerabilities and one high-severity denial of service bug. One RCE affects App Router apps using Cache Components with 'use cache' functions returning typed arrays and has no workaround; the other affects SVG image optimization on glibc-based Linux via an upstream sharp library flaw. The DoS bug affects App Router apps using Server Actions, where crafted requests can exhaust CPU and block further requests.

