Two U.S. banking trade groups have initiated a lawsuit against the Consumer Financial Protection Bureau (CFPB) regarding its new 'open banking' rules. The groups argue that the CFPB has overstepped its authority and that the implementation of these rules could compromise the security and privacy of consumer financial data. This legal challenge comes as U.S. banks prepare for a shift towards an open banking framework, which emphasizes consumer data sharing among financial institutions. The lawsuit highlights ongoing tensions between traditional banking practices and emerging regulatory changes aimed at enhancing consumer access to financial services.