OpenAI has made available an open-source tool called Codex Security CLI, which uses AI to automatically identify and rectify vulnerabilities in code repositories. This tool has already been effective in addressing over 3,000 critical security issues. The release of this tool is part of a broader effort by AI companies to develop AI-powered defenses against increasingly sophisticated cyberattacks. This development matters as it provides developers with a new resource to help them strengthen the security of their code.