Dublin Airport has confirmed a significant data breach affecting potentially 3.8 million passengers who traveled through the Irish facility during August 2025, following a cyberattack on aviation technology supplier Collins Aerospace. The breach compromised boarding pass data for all flights departing Dublin Airport from August 1-31, 2025, a period during which the airport processed over 3.7 million passengers across more than 110,000 daily passenger movements.
The Dublin Airport Authority (DAA), which operates both Dublin and Cork airports, first learned of the compromise on September 18, 2025, when Collins Aerospace notified them of a breach affecting its IT systems. By September 19, intelligence gathered by airport authorities confirmed that boarding pass information had been published online by a cybercriminal group. Cork Airport officials clarified that none of the compromised data relates to flights through their facility.
The exposed data includes passenger booking references, first and last names, frequent flyer numbers, contact information such as email addresses and phone numbers, and travel itineraries. Airlines including Swedish carrier SAS have sent notifications to affected passengers warning that other booking-related details may have been accessed. H
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