According to BleepingComputer, Japan Airlines said Amadeus notified it on October 23 of unauthorized access to its Passenger Service System between August 10, 2023 and September 23, 2026, exposing booking codes, names and flight details of about 92,000 JAL customers, plus emails, phones and passport numbers for about 2,000; ANA, Asiana and Korean Air also confirmed impact [1]. Cathay Pacific said on October 30 that Amadeus told it someone used login credentials assigned to its system account to access reservation data, affecting about 53,000 Cathay bookings, and that Amadeus reset passwords, enhanced monitoring and has found no misuse [2]. Passengers of affected airlines should watch for individual notices and beware of scams using booking codes, flight and passport details [1][2].
Intruder uses system account credentials to roam Amadeus airline booking system for nearly three years, hitting passengers of JAL, Cathay, ANA, Asiana and Korean Air
1 min read
- Disclosed
- Oct 28, 2026
- Occurred
- Aug 10, 2023
- Published
- Nov 11, 2026
- Last updated
- Nov 11, 2026
- CVSS basis
- Our assessment
- Attack vector
- Impact
- Data type
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Transportation & logistics
What to do nowOur advice
- Watch for individual notices from your airline [1].
Timeline
Technical details
Remediation
References
Official / primary1
- [2]
“around 53,000 bookings relating to Cathay Pacific were affected by the unauthorised access in Amadeus’s system, which occurred between August 2023 and September 2026.”
Media1
- [1]
This site aggregates public information and is not security consulting advice. Test remediation steps before applying.