Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Kaiser Permanente

Disclosed Apr 16, 2012Confirmed

Official notice

What is known

People affectedNot stated in the sources we have
DisclosedApr 16, 2012
HappenedAug 24, 2012
AttackNot stated
Data exposedNot stated
SectorOther · US
StatusConfirmed

Sources

Official noticeoag.ca.gov
California Attorney General breach notice: KAISER PERMANENTE
Official noticeoag.ca.gov
California Attorney General breach notice: Kaiser Permanente

Notices filed

Residents of CAApr 16, 2012
California AGCount not stated
Residents of CAOct 29, 2012
California AGCount not stated

Other breaches at Kaiser Permanente

Tracking code on Kaiser websites and apps shared data of 13.4 million membersExposed data exposed names, IP addresses and health records.Exposed data13M affectedHealthcareUSUnverifiedApr 25, 2024Hacking breachHacking exposed names and health records. Reported to the California AG.990 affectedHealthcareUSSep 26, 2019Stolen laptop held names and member numbers of 160,000 Kaiser membersLost or stolen device exposed names, phone numbers and insurance details.Lost or stolen device160K affectedHealthcareUSUnverifiedJul 27, 2006
History of this record
disclosed2026-09-25
2012-10-29 to 2012-04-16by 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.

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