In today's landscape, businesses are increasingly automating their operations by linking numerous applications through direct APIs, SaaS marketplaces, third-party tools, and hyperautomation platforms, thereby establishing a SaaS to SaaS supply chain. This interconnected supply chain facilitates the transfer of data and permissions through an ever-growing network characterized by indiscriminate and shadow connectivity, which in turn amplifies the potential risks from supply chain attacks, misconfigurations, and data leaks. To mitigate these challenges, it is essential to bring SaaS to SaaS connectivity into the open and thoroughly map the associated risk surface. Organizations should proactively identify and notify stakeholders of risky alterations, new integrations, and unusual data flows. Additionally, implementing zero trust principles across the SaaS to SaaS supply chain, along with effective governance and policy enforcement, is crucial. This approach ensures rapid, ongoing, and unobtrusive management of the SaaS to SaaS supply chain's risk surface. Furthermore, it enhances collaboration between business application teams and enterprise IT security teams, fostering a more secure and efficient operational environment. By prioritizing these measures, organizations can better protect themselves against emerging cyber threats.