An Advance Passenger Information System (APIS) database holding more than 220 million passenger and crew records, including passport numbers and flight details, was accessible online through a chain of security misconfigurations. The system appears linked to a Vietnamese organization, according to the researchers who discovered it.
Advance Passenger Information Systems are used worldwide to collect identity, passport, and flight information from airlines before passengers and crew arrive at or depart from a country.
The exposed records span January 2017 to April 2026 and could involve travelers of many nationalities who flew to, from, or through Vietnam during that period.
Nine years of passenger and crew data
Kinryū Labs discovered the Elasticsearch cluster on June 3 while surveying exposed databases as part of research into ransomware activity.
The cluster, named 'pax-info', contained 29 indices and roughly 107 GB of data. Its two principal indices held 210,318,069 passenger records and 10,465,631 crew records, for a combined 220,783,700 entries.