Now, yes. Unless this happens again.

I think I read recently about some emulator portal you can selfhost, would that be silly enough? Requires you to acquire ROMs though.

Well done you then, in this case!

I am not sure how Emudeck downloads Cemu though. I only found instructions on downgrading Cemu for Emudeck that you should download directly from Github and delete the Cemu file in the Emudeck folders.

Which might mean that Emudeck is setup to download directly from Github, not using Flathub. That would then result in a user receiving the malware if they had updated via Emudeck during this time.