Data Breaches
Marriott Starwood guest database breach
A compromise of the Starwood guest reservation database was disclosed by Marriott after its acquisition of Starwood.
What is documented
Marriott described the incident as unauthorised access to the Starwood guest reservation database and published a support page for affected guests. The UK regulator later published an enforcement record.
Claim labels
FACT
Marriott publicly disclosed the Starwood reservation database incident on 30 November 2018.
SOURCE CLAIM
The scope and categories of affected guest information in this entry follow Marriott and regulator descriptions rather than an independent estimate.
Sources
Last link check: 2026-09-27. A link check confirms reachability, not that every claim has been independently reviewed.