It revealed that GTA 6 files were leaked to the network by a hacker. On GTAForums, he stated that he had also attacked Uber before. He pretended to be an employee of the company and received credentials for employees. So he got access to the source code of taxi search and food ordering applications.
In addition, the hacker left his data to be contacted by Rockstar employees. He probably wants to get a hige amount of money for not publishing a working build of GTA 6 on the web.
Recently, Take-Two's first complaints about the leak began. The YouTube videos with the leaked information have been deleted.