Yes, light can travel in a vacuum. In fact, it's the only thing that can travel at the speed of light in a vacuum! When we say light, we're referring to electromagnetic radiation, which is made up of oscillating electric and magnetic fields. These fields propagate through space at the speed of light, and they don't need anything to help them move along.
One example of light traveling through a vacuum is when you look at the stars. The light from those stars has been travelling through the vacuum of space for millions or even billions of years before reaching our eyes!