Marriott security incident history
Hacking, data breaches and other security incidents involving Marriott, with related coverage.
Marriott International data breach affects up to 5.2 million guests
5.2mImpact: Data of up to 5.2 million guests
Marriott International confirmed a data breach affecting up to 5.2 million guests. The date of the incident, the data exposed, the cause and any further response have not been confirmed.
Read on Sophos ↗Otelier data breach hits Marriott hotels
↳ Knock-on damage from the Otelier incident · View original incidentHotels of Marriott International, Inc. were affected by the Otelier data breach. Hilton hotels were also affected by the same incident.
Read on Top Class Actions ↗Marriott Starwood breach exposes customer passport data and more
Impact: Data including customer passport information
A data breach occurred at Marriott's Starwood in 2018, and the leak of customers' passport information went undetected for four years. Marriott admitted that for five years it had wrongly claimed that encryption was in use at the time. It later agreed to pay $52 million and strengthen security to settle investigations into the breach, and in 2025 it won an order from a US appeals court voiding a related class action.
Related reports: 14 · last report →