Following traffic and under heavy braking due to lead vehicle braking hard and making turn without turn signal, brake pedal went to floor and vehicle continued traveling forward resulting in rear end collision with vehicle in front. Upon inspection at dealership both rear brake lines found to be corroded badly and sever leakage from both left and right rear brake lines. Corrosion & weeping also noted by dealership body shop on both lines coming out of vehicle from under rear seat above fuel tank. The corrosion and leakage matches with recall campaign ID: 14V311000.