AWS Security Hub is now integrated with AWS Health and automatically receives security-related findings from AWS Health to provide you with a more complete view of your AWS security posture. AWS Health delivers alerts about your resource performance and the availability of your AWS services and accounts. AWS Health alerts also cover some security topics, and those security-related alerts are now sent to Security Hub. Examples of security-related alerts from AWS Health include alerts about compromised AWS access keys, security alerts about an AWS service (e.g., an older version of a AWS RDS database that needs to be upgraded due to a known vulnerability), or alerts about operational issues associated with an AWS security service (e.g., a regional outage).
Source:: Amazon AWS