The team known as "Lizard Squad", was DDOSING Sony and Microsoft on around Christmas. They found a security flaw that allowed the team to edit any code's of the firmware which means they can make it run anything they make including emulators, pirated games, and other homebrew apps. Remember this is only a rumor so dont get you hopes up, if this is true the CFW is expected to released really soon...
Pastebin info about PS4 Jailbrek