Wasn't BCB breached for a couple hundred million reais this month, as well? Maybe they are trying to keep the code closed because they know it's insecure
It wasn't a BCB breach. The issue was with an integrator. Like a client API built on top of it that provided banking features to fintech startups
So no, it wasn't a breach to BCB, neither it was caused by system insecurity, but rather, human error in a downstream implementation.