Sola Scriptura Part 3 - Is the Canon of Scripture Self-Authenticating?

Since the original manuscripts of the Bible contain no “table of contents,” how can we can be sure that all the right books were included or excluded? Jesus validated all the books of the Old Testament, but what about the books written after He lived?
How do we know whether several so-called “disputed books” - 2 Peter, James, 2 John, 3 John and Jude - are authentic?
Is this a problem for the doctrine of Sola Scriptura?