Security incident at client
i made a big blunder. i logged into an unauthorized note taking application at my client. and pasted code from our internal application into the note application. i did not know that code will end up going outside the client network. it was flagged by cybersecurity. and they said they will reach out to my client manager, and then i would have to sign a form. and a refresher on some course. they said hr will not be involved at the client side.
i have not informed my manager at my parent company (big4). what should i do?
will i get fired?
Edit: i forgot to add i started this engagement 2 weeks ago