When you see or eat cranberries in a dream, it's generally a sign of good health and a long and happy life.
Cranberries can also represent warmth and togetherness which you might be craving right now, given the time of year or you may be feeling content at present because you have just enough of this in your waking life. Perhaps you are a particularly warm person towards others and you have felt some of that back of late.
If you were drinking cranberry juice in your dream, it's possible you have too much stress in your waking life and need to dial things back to help you to manage your stress levels better.
If you were picking cranberries in your dream then perhaps you recognise the effort you need to put into something before you are rewarded and the choices you have consequently- you are a hard worker.
If the berries were spoiled then maybe you recognise that you've missed and opportunity in the recent past.
The Complete A-Z Dictionary of Dreams by Ian Wallace
tagged in Dream Interpretation