Short answer
I'd avoid them. Cream cheese is high in fat and often contains garlic or chive flavorings, both of which are harmful to cats. A tiny lick from a plain, unflavored treat might be okay, but it's not a healthy choice. Watch for vomiting, diarrhea, or loss of appetite, and contact your vet if you see these signs.
Cream cheese — Food safety facts
Feed with care · Cats · full breakdown on the linked food page
Fatty and often contains garlic or chive flavourings. A lick at most.
The full verdict, portion guidance and serving notes are collected on the Cream cheese food facts page.