This explores the fragmented governance of solar geoengineering (SG) technologies, focusing on the role of key international bodies such as the Convention on Biological Diversity (CBD), United Nations Environment Assembly (UNEA), and the London Convention/London Protocol (LC/LP). As global efforts to address SG governance remain divided, the brief highlights the urgency for coordinated approaches that safeguard biodiversity, prioritize environmental protection and include the voices of climate-vulnerable communities. The brief outlines the next steps for the CBD to take a leadership role in assessing SG’s risks, building capacity for climate-vulnerable communities, and promoting inclusive, transparent global deliberations on the future of SG governance.