Cass Information Systems, which specializes in payment and information services, was reportedly subjected to a ransomware attack by the CoinbaseCartel in May 2026. This claim was made by the threat actor group, but Cass Information Systems has not officially confirmed a data breach.
Specific details regarding the number of affected individuals, the exact types of data exposed (such as SSNs, medical data, or financial account data), and the states affected remain unclear. Official company statements or regulatory filings confirming this incident have not been made public.
It is important to note that information surrounding such incidents can evolve as more details become available or as companies issue official notifications.