Save a real picked file path to a JSON file in Chromium - any Workarounds?

I'm developing a windows desktop application using HTML/JS with CefSharp (also thinking about using Electron) to display it in Chromium browser.

My application should create JSON-Profiles with windows settings for another command-line application which will execute these settings (for example, registry setting). For some settings it is needed to execute a batch file, so I want to pick a path to this file from the GUI and save it to the JSON-Profile.

The problem I have with security settings of Chromium - it doesn't allow me to save a real picked path and fakes the value of input.

Are there any workarounds in my case?

Thanks in advance!