Next.js 16 Auth Security: 5 Mistakes Exposing Your App in 2026

Next.js 16 auth changed silently: proxy.ts replaces middleware.ts, Server Actions are open endpoints, and 13 CVEs hit in May 2026. Here is what to fix right now.

Next.js 16 auth changed silently: proxy.ts replaces middleware.ts, Server Actions are open endpoints, and 13 CVEs hit in May 2026. Here is what to fix right now.
Anthropic's Project Glasswing uses Claude Mythos Preview to find decades-old bugs that tools missed. Here's what it means for your code and what you can use today.