Published onFebruary 2, 2026Vercel Blocked My Deploy for a Next.js CVE. Here's the Fix I Used.nextjs-cve-fix-2025vercel-deploy-blockednextjs-security-vulnerabilitycve-2025-66478nextjsvercelsecuritybuild-failuresreact-server-componentsnextjs-upgrade-guideVercel blocked my Next.js deployment for CVE-2025-66478. Here is what the error means, which versions are patched, and how to fix it.