Next.js Security Update - React2Shell (CVE-2025-55182) #cybersecurity

Description

These vulnerabilities originate in the upstream React implementation (CVE-2025-55183, CVE-2025-55184). This advisory tracks the downstream impact on Next.js applications using the App Router. A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints. #cybersecurity #infosec #react #rce #exploit #vulnerability