Summary of CVE-2026-23869

A high-severity vulnerability (CVSS 7.5) in React Server Components and Next.js App Router can lead to Denial of Service attacks.

• •Affects Next.js versions 13.x, 14.x, 15.x, and 16.x with the App Router
• •A specially crafted HTTP request to Server Function endpoints can trigger excessive CPU usage
• •Vercel deployed WAF rules to protect all hosted projects at no additional cost
• •Immediate upgrades to patched versions are required for full protection (15.5.15+ or 16.2.3+)

This summary was automatically generated by AI based on the original article and may not be fully accurate.