Cranberry Vine is one of the vines added by the Soul Forest Mod. It is a vine that contains mixed cranberries which have red and purple colours. The Cranberry Vine, as all the other vines, isn't climable.
To harvest all of the vines you will need a berrycollector.
The most important recipe for most of the vines, is the crafting of a Bushel. You can craft a Cranberry Bushel with 9x Cranberry Vines. Once you've got the bushel, you can't re-claim the vines.
The main purpose of the vines, is the crafting of the newly added food-types by the Soul Forest Mod. You can't craft the vines directly into food, you will first need to craft the vines into bushels as described above.
With Baneberry Bushel you can create a Cranberry Juice and a Cranberry Muffin.
The Cranberry Vine can be used as a farming material, if you would make a big "vine-farm" you can easily harvest more then enough of this vine to make a lot of Cranberry Juices and Cranberry Muffins. But ofcourse it can also be used to decorate the walls.