Apache Log4j, a widely-used Java library, has a critical vulnerability in versions prior to 2.16.0, allowing attackers to remotely execute code. GitHub's security team has shared their response and offers tools to help users assess and mitigate the risk. The recommended solution is upgrading to Log4j version 2.16.0, or setting a specific system property if upgrading isn't possible. GitHub Dependabot can help users manage Java dependencies by providing alerts and pull requests for upgrades, although it currently does not support all dependency management tools. Additionally, GitHub offers an experimental CodeQL query for Advanced Security customers and open-source project maintainers to identify potentially affected code. Users are encouraged to enable Dependabot and CodeQL queries to quickly identify and address vulnerabilities.