[CannisterFlux]

Same thing for me, last couple of weeks I've seen a few emails appear, before that I've not seen inbox spam for ages. I also started getting Drive share notification spam around the same time, until I turned notifications off, but new random spam shares keep appearing if I check the app.

[radarsat1]

I started getting these Drive share notifications as well, always written in Greek for some reason. (Well, I didn't try translating, so could be just nonsense, but it was strings of Greek characters.)

Very strange, seems like an obvious security hole to just allow anyone to pop up notifications on my phone like that.