Cats are lactose intolerant, which means they can't properly digest the lactose in cream.
This can lead to stomach upset, vomiting, and diarrhea.
The high-fat content in cream could also cause pancreatitis if consumed in large amounts.
Suggestions
It's best to avoid giving your cat cream.
If you do decide to offer it, make sure it's in a very small amount and only occasionally.
Monitor your cat for any signs of digestive upset afterward.
Note: even if labeled as safe, any food can potentially cause allergies. When introducing a new food, please feed a small amount and observe your cat for any allergic reactions.