Every public data breach

53 disclosed this week · 26,385 on record

Kaiser Foundation Hospitals

Disclosed Nov 1, 202444,600 affectedConfirmed

Official notice

The covered entity (CE), Kaiser Foundation Hospitals, reported that several employees were the targets of an email phishing scheme that compromised the protected health information (PHI) of 44,600 individuals. The PHI involved included demographic and clinical information. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE changed password/strengthened password requirements, implemented new technical safeguards, and revised policies and procedures.

What is known

People affected44,600 (as reported to HHS)
DisclosedNov 1, 2024
HappenedAug 2, 2024
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Kaiser Foundation Hospitals

History of this record
attack2026-09-25
unknown to hackingby backfillSource
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
empty to hhsby backfillSource
records2026-09-25
empty to 44600by backfillSource
summary2026-09-25
empty to The covered entity (CE), Kaiser Foundation Hospitals, reported that several employees were the targets of an email phishing scheme that compromised the protected health information (PHI) of 44,600 individuals. The PHI involved included demoby 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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