Please report security problems privately through GitHub: on the Security tab of the affected repository (an app's, or this one for the shared library), choose "Report a vulnerability". For this repository that is https://github.com/zakijss/MiniDeck/security/advisories/new. Don't open a public issue for them.
Say what you found, the release or commit, and how to reproduce it. The reply comes in the advisory's thread, and a fix ships in a new release.
A problem in Tailscale itself belongs with Tailscale: see https://tailscale.com/security. If it affects MiniScale's build (for example a fix that needs a newer pinned version), report it in MiniScale too.
Only the latest release gets fixes.