React2Shell (CVSS 10.0): Patch React & Next.js NOW | Unauth RCE Explained
A maximum-severity vulnerability is hitting React Server Components - and if you're running Next.js, you may be vulnerable by default. React disclosed CVE-2025-55182, nicknamed React2Shell, an unauthenticated remote code execution (CVSS 10.0) affecting React Server Components via the Flight protocol. Next.js tracks downstream exposure as CVE-2025-66478: That means internet-wide scanning is likely. Who’s affected?