Flatpaks aren't docker containers, though. They should be safer. The most glaring hole in most flatpak is X11 access.
There have been some flatpak CVEs in the past, but I wonder what your claim of them not being secure is based on, other than general principles: yes, there could be a bug in the sandbox, but besides that?
There have been some flatpak CVEs in the past, but I wonder what your claim of them not being secure is based on, other than general principles: yes, there could be a bug in the sandbox, but besides that?