CommBank confirmed it was dealing with an “issue” and apologised for the disruption.
“We’re aware of an issue with the CommBank app and NetBank affecting credit cards and debit cards,” it posted on Twitter.
“Some card settings may also be unavailable right now. We apologise for disrupting your morning, we’re working urgently to fix this as soon as we can.”
Direct debits should be operating as normal, CommBank said.
The bank said it was aware of the issues and investigating them “as a priority” when replying to customers online.