The National Science Foundation (NSF) is inviting proposals for the "Safety, Security, and Privacy of Open-Source Ecosystems" grant program, aimed at addressing vulnerabilities in open-source products and their development infrastructures. This initiative seeks to enhance the safety, security, and privacy of open-source ecosystems (OSEs) by funding projects that tackle both technical and socio-technical vulnerabilities, thereby catalyzing improvements that the ecosystems currently lack the resources to implement. With an estimated total program funding of $15 million, eligible applicants include U.S.-based for-profit organizations, non-profit organizations, state and local governments, tribal nations, and institutions of higher education, with proposals due by April 22, 2025. For further inquiries, interested parties can contact NSF grants.gov support at grantsgovsupport@nsf.gov.