This book constitutes the proceedings of the 26th International Symposium on Stabilization, Safety, and Security of Distributed Systems, SSS 2024, held in Nagoya, Japan, during October 20-22, 2024. The 22 full and 4 invited papers as well as 6 short papers included in this book were carefully reviewed and selected from 69 submissions. They deal with the design and development of distributed systems with a focus on systems that are able to provide guarantees on their structure, performance, and/or security in the face of an adverse operational environment. The book also includes one invited talk in full paper length. .