Ticketmaster Australia said its UK counterpart experienced the breach which could affect some Australian customers.
Customers are starting to be contacted after it was revealed the personal and payment details were stole in the hacking incident.
On Saturday June 23 Ticketmaster UK identified malicious software on a customer support product hosted by Inbenta Technologies, an external third-party supplier to Ticketmaster.
Around 30,000 UK Customers were identified as being affected in the breach.
The company said as soon as it discovered the malicious software, it disabled the Inbenta product across all Ticketmaster websites.
As a result of Inbenta’s product running on Ticketmaster International websites, some of customers personal or payment information may have been accessed by an unknown third-party.
Australian customers may be affected if they purchased tickets from the site between September 2017 and June 23 2018.
"Whilst we have no evidence to suggest your data has been compromised, we are notifying you out of an abundance of caution," an email addressed to Ticketmaster customers said.
Teams are now working to rectify the security breach.
Customers are urged to to reset their passwords when they next log into their accounts.
Ticketmaster is also offering impacted customers a free 12 month identity monitoring service.
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