A misconfigured Elasticsearch cluster exposed roughly 220.8 million airline passenger and crew records, including passport numbers and full itineraries, before it was secured in June, researchers at Kinryu Labs disclosed.

The records spanned January 2017 through April 2026 and came from an Advance Passenger Information System deployment - the standardized data feed airlines transmit to border authorities before departure, covering traveler identity and flight details. Researchers linked the server to IP address space assigned to Vietnamese telecommunications operator Viettel in Hanoi but said they could not confirm which organization operated it.

What was exposed

As per BleepingCompu...