High Government / Tribal Administration · January 2026
Cheyenne and Arapaho Tribes
The Cheyenne and Arapaho Tribes of Oklahoma suffered a data security incident resulting in unauthorised access to tribal member and employee personal information.
Records Affected
Undisclosed
Sector
Government / Tribal Administration
Data types exposed
Names Social Security Numbers Date of Birth Address Medical Information
Detailed analysis for this incident is still being compiled. Check back soon for more information.