Rooted in idealism, the open-source model leverages collaborative intelligence to drive innovation, leading to major benefits for both industry and society. As open-source software (OSS) plays an increasingly central role in driving the digitalization of society, policymakers are examining the interactions between upstream open-source communities and downstream manufacturers. They aim to leverage the benefits of OSS, such as performance enhancements and adaptability across diverse domains, while ensuring software security and accountability. The regulatory landscape is on the brink of a major transformation with the recent adoption of both the Cyber Resilience Act (CRA) as well as the Product Liability Directive (PLD), raising concerns that these laws could threaten the future of OSS.

This paper investigates how the CRA and the PDL regulate OSS, specifically exploring the scope of exemptions found in the laws. It further explores how OSS practices might adapt to the evolving regulatory landscape, focusing on the importance of documentation practices to support compliance obligations, thereby ensuring OSS's continued relevance and viability. It concludes that due diligence requirements mandate a thorough assessment of OSS components to ensure their safety for integration into commercial products and services. Documentation practices like security attestations, Software Bill of Materials (SBOMs), data cards and model cards will play an increasingly important role in the software supply chain to ensure that downstream entities can meet their obligations under these new legal frameworks.