@vitejs/plugin-rsc vendors react-server-dom-webpack, which contained an unauthenticated remote code execution vulnerability in versions prior to 19.0.1, 19.1.2, and 19.2.1. See details in React repository's advisory https://github.com/facebook/react/security/advisories/GHSA-fv66-9v8q-g76r

Applications using affected versions of @vitejs/plugin-rsc are vulnerable to unauthenticated remote code execution through deserialization of untrusted data. An attacker can execute arbitrary code remotely without authentication, affecting confidentiality, integrity, and availability.

Upgrade immediately to @vitejs/plugin-rsc@0.5.3 or later.

Applications not using server-side React or React Server Components are unaffected.