Qantas has apologised after a "technology issue" with its mobile app exposed users' travel details including their names, flights and points.
Many posted on social media that they were seeing other passengers' names, accounts, flight plans, points, and boarding passes.
Some reported that the glitch persisted even after the airline said it had fixed the app.
"We apologise to customers impacted by the issue with the Qantas app this morning, which has now been resolved," the carrier said in a statement.
"Current investigations indicate that it was caused by a technology issue and may have been related to recent system changes," it said.
While some customers had access to other passengers' flight details, Qantas said it was not aware of any customers having travelled with incorrect boarding passes as a result of the incident. Source: Getty / Hinterhaus Productions
Qantas confirmed that some frequent flyers saw other users' travel information including names, upcoming flight details, points balance and status.
"No further personal or financial information was shared, and customers would not have been able to transfer or use the Qantas Points of other frequent flyers," it said.
"We're not aware of any customers travelling with incorrect boarding passes."
Major cyber attacks in recent years have raised concerns about the protection of Australians' personal data.
In November 2022, Australia's largest private health insurer Medibank said hackers had accessed the data of 9.7 million current and former customers, including medical records.
The glitch with the Qantas app came after the airline's.
"We haven't delivered the way we should have and we've often been hard to deal with," she said.
The airline promised to improve the experience of flyers, and support its workers better,
"We want to get back to the national carrier that Australians can be proud of," the airline chief said at the time.