The hack of the Australian carrier follows recent incidents at Hawaiian Airlines and Canada’s WestJet. Here’s what you need to know. Qantas said on Wednesday it is contacting customers after a cyberattack targeted a third-party customer service platform that stored the personal data of 6 million customers.

Australian airline Qantas says a data hack on Monday exposed the personal information of six million customers and it expects the amount stolen to be “significant.”

Nothing tests a consumer’s fragile faith or a company’s integrity quite like a cyberattack. Qantas’ brand is in a particularly precarious position given it is in the process of restoration after a couple of years of neglect.