I actually get vegan soup cubes and broth. They are made for vegan consumption. I also want to mention that a lot of white refined sugars are also not vegan. I know which ones are vegan however, I don't use white sugar. Many white sugars are refined using animal bone char. Many people are not aware of this.
Thanks for the information about the cubes. It is assumed that if the ingredients do not contain animal products that they are automatically vegan.