Vehicle accelerated fully by itself, with no acceleration from the driver, and violently collided with the parked vehicle in front of it. The impact was so strong that it pushed the parked vehicle into the vehicle in front of it. Safety was greatly put at risk, had there been people in the impacted vehicles, or a child crossing in front of our vehicle when the acceleration was activated. The vehicle has not been inspected, but a case with the manufacturer has been opened, and the vehicle data has been retrieved. There were no warnings or hints from the vehicle at all, prior to the unintended acceleration.