I don't think that at this age there any really no no juices as long as you are following basic guildelines (100% juice, watered down, and given sparingly), that said,I would not give 100% pure cranberry juice to my worst enemy, let alone my baby. And as said above babies don't need juice, it's not a health food and if over done, can be bad for them.
Sweet juices like apple may not have sugar added to it, but they are still high in natural sugar, and sugar is sugar so unless you are treating a health problem I would steer clear. Despite the above stated anecdotal evidence to the contrary, there is pretty sound research that says that high simple sugar consumption increases risk of diabetes, obesity etc.
There are also some juices that have artifical sweeteners in them like the low cal or sugar free Cranberry juice, but I would not feed those to a baby.
If you really want to give juice consider carrot or a vegetable/fruit blend (watered down of course) so that you are still getting some flavor without it being so sweet. Some babies are more sensitive than others to acid, but you'll never know until you try. And if the juice is watered down, i don't think it matters as much.