when I apply my brakes, pedal goes all the way down and they feel squishy on 2000 Oldsmobile Alero

My brakes have been working fine, but today, after my car sat in the garage for more than one day, I pulled out of the garage and they did not respond quickly. the pedal went all the way down and my brakes felt squishy, though they still worked

Asked by for the 2000 Oldsmobile Alero
Sounds like the brake master cylinder has failed or you have a brake fluid leak and has lost pressure, Have your vehicle towed to a repair shop and you can find one here and check repair prices here