This book constitutes the refereed proceedings of the 8th International Conference on Cybersecurity, Privacy and Trust, held as Part of the 28th International Conference, HCI International 2026, in Montreal, QC, Canada, in July 2026. A total of 7435 individuals from academia, research institutes, industry, and government agencies from 94 countries submitted contributions to HCII 2026. Following peer review, 1463 papers and 360 posters (as short research papers) are included in the volumes of the HCII 2026 proceedings published just before the start of the conference. One volume of the HCII 2026 proceedings is dedicated to this year’s edition of the HCI-CPT conference focusing on topics related to:?      HCI for Cybersecurity, Privacy and Trust: Cybersecurity Awareness, Training, and Learning; Trust, Governance, and Human Oversight in AI-Enabled Cybersecurity; Authentication, Identity, and Access Security; Socio-Technical and Regulatory Dimensions of Cybersecurity and Data Privacy; AI and Cyber-Physical Security Threats