Mars Lan, Co-founder and CTO of Metaphor, sheds light on the security challenges surrounding open-source software, debunking myths of its safety in critical industries. He discusses the complexities of dependency management, revealing common vulnerabilities in popular programming languages like Python and TypeScript. The conversation also dives into the contrasting security dynamics of open-source versus proprietary software and emphasizes accountability. Additionally, Lan highlights how Metaphor enhances data understanding and trust through innovative graph technologies.