I could only exploit this for my own account, and there are only money involved, if it was human lives at stake, I would not have worked at anything else until

I could only exploit this for my own account, and there are only money involved, if it was human lives at stake, I would not have worked at anything else until the issue was fixed. The bug that lead to me discovering the security issue was mitigated by another developer, the security issue was also deemed fixed, I am 100% it was not, but there's no way to proove it at the moment, except u production, that's why I said I was tempted to actually do it. Anyway, there's nothing much to gain by me by antagonising another coleague, the management or the bank. It's not worth the ego boost or frustration scratch, worst case scenario, I don't patch the issue in time and the bank looses money and they start taking security more seriously.