The leak comes via Beyond3D but has been reported by several sites. Playstation 5 is going by the working name Aerial and is scheduled for release in the first half of 2020 with a reveal in the next 3 months.
Can't say for sure if this is the development kits or what they are targeting for final hardware, either way it's absolutely beast.
CPU - 8c16t Zen2 @3.2ghz
GPU - 14.2tflop Navi graphics engine
20GB GDDR6, 880Gb/s 4GB DDR4 OS
I guess we will find out soon enough but this would be an absolute beast machine easily capable of outdoing even the best current rigs with console optimization. Could be a dev kit though, even then at 15% reduction in capability it would be powerful.
Also a video on Redgamingtech channel.