The BBC is reporting that Marriott has admitted it has had data of 500,000,000 guests accessed in a breach of its reservations database.

More information is coming in.

On 19 November it found that data containing data Starwood guests, a chain it bought recently had been compromised.

For about 327 million of the guests, it added, the information includes some combination of a name, mailing address, phone number, email address, passport number, Starwood Preferred Guest account information, date of birth, gender, arrival and departure information, reservation date, and communication preferences.