I've got a massive brake leak but not from the reservoir its from the ABS unit its ate away the paint under the hood down to bare metal and today on the highway the low brake fluid light cam on but the reservoir is full.
I have never seen one leak.. Has it done this since new? because it takes a little time for all the paint to peel off from that area. I would bring it in right away and DO not drive the car. Also you want to make sure they fix the paint damage so it does not rot out over time.