Singapore Airlines said on November 4 that about 46,000 booking records may have been affected by a security incident at Amadeus, its reservation technology provider, The Star reported.
The exposed data includes names, booking reference numbers, itineraries and booking classes. For roughly 620 records, email addresses, phone numbers, travel document details and KrisFlyer membership numbers may also have been accessed.
Amadeus reported a vulnerability in a travel booking display environment and did not say how many customers were affected overall. It confirmed that bank account and credit card details were not leaked and that bookings were not modified. Singapore Airlines says its own IT systems were not breached.
As a precaution, the airline is contacting customers with upcoming trips to change their booking reference numbers.