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Browse data breaches affecting California residents in 2026. Stay informed about security incidents and protect your personal information.
Showing 25 breaches affecting California
Discovered Aug 18, 2026
Langwasser & Company CPAs experienced a reported data breach in 2026 involving a network security incident dated May 5, 2026. The affected population and data types have not been publicly disclosed.
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Discovered Aug 18, 2026
Corporation Service Company (CSC) experienced a data breach in 2025, which it reported to regulators in August 2026. The incident may have exposed personal information of an unconfirmed number of individuals.
You may be entitled to compensation
Discovered Aug 18, 2026
Together Women's Health experienced a data breach in late 2025, confirmed through an investigation by Strauss Borrelli PLLC, stemming from a third-party vendor incident.
You may be entitled to compensation
Discovered Aug 18, 2026
Langwasser & Company CPAs experienced a data breach in May 2026, which was confirmed by the California Attorney General.
Discovered Aug 16, 2026
See’s Candies, Inc. experienced a data breach in April 2026, confirmed by a California Attorney General filing. The extent of the breach and specific data types involved remain unclear.
Discovered Aug 15, 2026
May Trucking Company experienced a data breach in June 2026, which was publicly disclosed in August 2026. The incident potentially exposed personal information, including Social Security numbers.
You may be entitled to compensation
Discovered Aug 15, 2026
Terry J. Dubrow, MD, A Medical Corporation experienced a data breach in 2026, stemming from unauthorized access that began in January 2025 and was discovered in July 2026.
Discovered Aug 14, 2026
May Trucking Company, an Oregon-based logistics carrier, experienced a data breach in 2026. This incident involved unauthorized network access and the theft of files.
You may be entitled to compensation
Discovered Aug 14, 2026
Terry J. Dubrow, MD, A Medical Corporation, a Newport Beach plastic surgery practice, experienced a data breach with network access starting January 2025. Affected individuals were notified in August 2026.
You may be entitled to compensation
Discovered Aug 14, 2026
Terry J. Dubrow, MD, A Medical Corporation experienced a data breach in 2026 involving patient information, which was reported to the California Attorney General.
Discovered Aug 13, 2026
Universal Plant Services, LLC reported a 2026 data breach involving Social Security numbers. The California Attorney General lists June 8, 2026, as the breach date, but the affected-person count and other timeline details remain undisclosed.
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Discovered Aug 12, 2026
SF Bay Data Entry data breach in 2026 was reported by RansomLook as a leaked incident, but no official confirmation has been found. The source shows a California-based entry with 25.8 GB listed and no disclosed affected count.
Discovered Aug 12, 2026
DinaTec data breach in 2026 was reported on RansomLook as a leaked post by the Crpx0 group, but the breach has not been publicly confirmed. The available record places DinaTec in California, USA, and does not confirm affected counts or exposed data types.
Discovered Aug 12, 2026
Leer Corp data breach was posted on RansomLook in 2026, but the listing only shows a leaked incident and does not confirm the data types or number of affected people.
Discovered Aug 11, 2026
USA DeBusk LLC experienced a data breach with an unknown number of affected individuals and undisclosed data types, as confirmed by regulatory filing and active litigation in 2025 and 2026.
You may be entitled to compensation
Discovered Aug 11, 2026
James C. Standring, DDS experienced a data breach in 2024, impacting 6,658 individuals, with notice provided in 2026. Litigation is under investigation.
You may be entitled to compensation
Discovered Aug 6, 2026
Louis Tieu DDS MD was the subject of a reported 2025 data breach claim by the INC ransomware group. The reports-only allegation involved more than 500 pieces of patient-related personal data, but the number of affected individuals has not been publicly confirmed.
Discovered Aug 6, 2026
Club One Casino data breach in 2026 was listed by a ransomware tracker, but no official confirmation or impact details were available. The report identified the victim as clubonecasino.com and linked the incident to ThreeAM.
Discovered Aug 6, 2026
Jerry Leigh data breach in 2026 was listed by a ransomware tracker, but no company or regulator confirmation was found. The public listing did not identify affected-count details or exposed data types.
Discovered Aug 6, 2026
Robert Arshagouni, a California accounting practice, disclosed a data breach in 2026 involving client names and Social Security numbers.
You may be entitled to compensation
Discovered Aug 5, 2026
A reports-only Club One Casino data breach was listed by RansomLook on August 5, 2026, with the post attributed to the 3AM ransomware group. The available sources do not confirm affected individuals, exposed data types, or an official company notification.
Discovered Aug 5, 2026
UCLA Health identified unauthorized activity involving patient information, leading to a data breach. The specific date of the incident is unknown.
Discovered Aug 4, 2026
A potential data breach may have affected CTS Journey Holdings, LLC (DBA Corporate Travel Service) in an unspecified year, but details remain unconfirmed.
Discovered Aug 1, 2026
A potential Everside Health data breach was identified from a California AG listing, but no further details are available from public sources.
Discovered Aug 1, 2026
SM Energy Company experienced a data breach in 2026 where an unauthorized third party accessed its systems, potentially affecting at least 3,931 individuals.
You may be entitled to compensation
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