Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Hyatt Hotels

Disclosed Sep 23, 2016Confirmed

Official notice

What is known

People affectedNot stated in the sources we have
DisclosedSep 23, 2016
DiscoveredJul 7, 2017
HappenedMar 18, 2017
AttackHacking
Data exposedNamesPayment cardsFinancialPasswords
SectorHospitality · US
StatusConfirmed

Sources

Official noticeoag.ca.gov
California Attorney General breach notice: Hyatt Hotels
Official noticeatg.wa.gov
Washington Attorney General breach notice: Hyatt Hotels
Official noticejustice.oregon.gov
Oregon DOJ breach notice: Hyatt Hotels
Official noticemaine.gov
Maine Attorney General breach notice archive: Hyatt Hotels

Notices filed

Residents of MESep 23, 2016
Maine AG79 people
Residents of CAOct 12, 2017
California AGCount not stated
Residents of WAOct 12, 2017
Washington AG640 people
Residents of OROct 12, 2017
Oregon DOJ24,599 people
Residents of MEOct 12, 2017
Maine AG19 people

Other breaches at Hyatt Hotels

Hacking breachHacking exposed names, payment cards, financial details and passwords. Reported to the California AG.HospitalityUSJan 14, 2016
History of this record
disclosed2026-09-25
2017-10-12 to 2016-09-23by backfillSource
data_types2026-09-25
[] to ["names","payment-card","financial","passwords"]by backfillSource
attack2026-09-25
unknown to hackingby backfillSource
discovered2026-09-25
empty to 2017-07-07by backfillSource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

Everything about Hyatt Hotels