Critical React, Next.js flaw lets hackers execute code on servers

A maximum severity vulnerability, dubbed 'React2Shell', in the React Server Components (RSC) 'Flight' protocol allows remote code execution without authentication in React and Next.js applications.
The Hacker News

Critical RSC Bugs in React and Next.js Allow Unauthenticated Remote Code Execution

Critical RSC flaws in React and Next.js enable unauthenticated remote code execution; users should update to patched versions now.
Security Boulevard

Denial-of-Service and Source Code Exposure in React Server Components

In early December 2025, the React core team disclosed two new vulnerabilities affecting React Server Components (RSC). These issues – Denial-of-Service and Source Code Exposure were found by security ...