Electron Packager bundles Electron-based application source code with a renamed Electron executable and supporting files into folders ready for distribution. A random segment of ~1-10kb of Node.js heap memory allocated either side of a known buffer will be leaked into the final executable. This memory could contain sensitive information such as environment variables, secrets files, etc. This issue is patched in 18.3.1.
The product makes resources available to untrusted parties when those resources are only intended to be accessed by the product.