Unauthorized access to Docker Hub database
During a brief period of unauthorized access to a Docker Hub database, sensitive data from approximately 190,000 accounts may have been exposed (less than 5% of Hub users). Data includes usernames and hashed passwords for a small percentage of these users, as well as GitHub and Bitbucket tokens for Docker autobuilds. Data includes usernames and hashed passwords for a small percentage of users as well as GitHub and Bitbucket tokens for Docker autobuilds.
Source: success.docker.com