California data breach notifications, November 2026

10 notices reported.

Organization	Source	Reported	Residents affected	Data exposed
Yu Ming Charter School	California AG	Nov 4, 2026	Not published	Social Security numberPassport numberFinancial / bank accountDate of birth+4
RevSpring, Inc.	California AG	Nov 4, 2026	Not published	In the letter (PDF)
Hoag Memorial Hospital Presbyterian	California AG	Nov 4, 2026	Not published	Medical / health informationPostal addressName
Hippo Analytics Inc.	California AG	Nov 3, 2026	Not published	Postal addressName
Peninsula Corridor Joint Powers Board (Caltrain)	California AG	Nov 3, 2026	Not published	Social Security numberName
Center Theatre Group of Los Angeles	California AG	Nov 3, 2026	Not published	Social Security numberFinancial / bank accountName
Upland Unified School District	California AG	Nov 3, 2026	Not published	Social Security numberFinancial / bank accountDate of birthUsernames / passwords+6
Cotton Incorporated	California AG	Nov 2, 2026	Not published	Usernames / passwordsEmail addressPostal addressName
University of Mississippi Medical Center (“UMMC”)	California AG	Nov 2, 2026	Not published	Medical / health information
DreamHost, LLC	California AG	Nov 2, 2026	Not published	Financial / bank accountUsernames / passwordsEmail address