Listen to this Post
The vulnerability resides in the `@vitejs/plugin-rsc` and its dependency react-server-dom-webpack. Affected versions improperly handle the deserialization of client-transmitted data within the React Server Components (RSC) protocol. An attacker can craft a malicious serialized payload (e.g., a manipulated React element tree containing dangerous objects) and send it to the server. During the server-side deserialization process, specially crafted objects within this payload can trigger the instantiation of unintended code paths or leverage prototype pollution, ultimately leading to the execution of arbitrary system commands on the host server. This attack is unauthenticated, requiring no prior authentication, and exploits the inherent trust the server places in the structure of the serialized RSC data stream.
Platform: Vite.js ecosystem
Version: Prior 19.0.1
Vulnerability: Deserialization RCE
Severity: Critical
date: Dec 3, 2025
Prediction: Patched Dec 3
What Undercode Say:
Check current plugin version
npm list @vitejs/plugin-rsc
Upgrade to patched version
npm install @vitejs/[email protected]
How Exploit:
Attacker sends malicious serialized payload via RSC stream to server endpoint. Server deserializes payload, executing embedded dangerous JavaScript objects as code on the backend.
Protection from this CVE
Upgrade plugin immediately.
Disable RSC if unused.
Implement strict input validation.
Impact:
Unauthenticated Remote Code Execution. Full server compromise. Data breach, system control.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
