Customers complained they were unable to do their online banking this morning with many saying they were unable to access their credit and debit cards.
Commonwealth Bank said the issue also affected contactless payments in shops.
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.”
Some payments may be unsuccessful and some card settings may also be unavailable, an alert message on the CommBank app read.
The bank said it was aware of the issues and investigating them “as a priority” when replying to customers online.
The bank confirmed services are now working again.
It said the issue only affected certain transactions including contactless payments in shops.
However, it said people would have been able to make payments by inserting their card.
It said it was investigating the cause.
“We apologise to any customers who experienced any issues with our services earlier today.
“Our systems are now returning to normal.”
This content first appear on 9news