Data breaches in May 2026
Data breaches first reported to a state attorney general, HHS or the SEC in May 2026: 29 breaches. Facts come from official filings with US state attorneys general, the U.S. Department of Health and Human Services (HHS) and the SEC; each breach page links its sources.
| Organization | First filed | People affected | Information exposed | Filed with |
|---|---|---|---|---|
| Morning Star ToursMorning Star Tours breach history | 18,997 |
|
Washington AG, California AG, Texas AG | |
| RCI Internet ServicesRCI Internet Services breach history | 40,178 |
|
California AG, Texas AG | |
| Educational Employees Credit UnionEducational Employees Credit Union breach history | 201,185 |
|
California AG, Texas AG | |
| Networking Technology, Inc.Networking Technology, Inc. breach history | 353,844 |
|
Washington AG, Texas AG, HHS, California AG | |
| Blue Teal Holdings, LLCBlue Teal Holdings, LLC breach history | 19,053 |
|
California AG, Texas AG | |
| Steel Warehouse Company LLCSteel Warehouse Company LLC breach history | 13,285 |
|
Texas AG | |
| Industrial Acceptance CorporationIndustrial Acceptance Corporation breach history | 79,216 |
|
California AG, Texas AG, Washington AG | |
| Texas CapitalTexas Capital breach history | 86,067 |
|
Washington AG, California AG, Texas AG | |
| Carnival CorporationCarnival Corporation breach history | 5,995,277 |
|
Washington AG, California AG, Texas AG | |
| Interstate Management Company, LLCInterstate Management Company, LLC breach history | 22,743 |
|
California AG, Texas AG | |
| ERMI LLCERMI LLC breach history | 74,074 |
|
HHS, California AG, Texas AG | |
| Barnhart Crane & Rigging Company, Inc.Barnhart Crane & Rigging Company, Inc. breach history | 22,822 |
|
Washington AG, Texas AG | |
| Radiology Associates of RichmondRadiology Associates of Richmond breach history | 266,183 |
|
HHS, Texas AG | |
| Cardinal Services, Inc, Cardinal Employer Organization, and Preferred Employer Solutions, collectively (“Cardinal”)Cardinal Services, Inc, Cardinal Employer Organization, and Preferred Employer Solutions, collectively breach history | 142,323 |
|
California AG, Texas AG | |
| Frost BankFrost Bank breach history | 200,271 |
|
Texas AG, California AG | |
| VacPartsWarehouse.com LLCVacPartsWarehouse.com LLC breach history | 23,820 |
|
Washington AG, California AG, Texas AG | |
| The Beacon Mutual Insurance CompanyThe Beacon Mutual Insurance Company breach history | 162,439 |
|
California AG, Texas AG | |
| Lumexa ImagingLumexa Imaging breach history | 2,994 |
|
HHS, California AG, Texas AG, Washington AG | |
| US Tiger Securities Inc. (“US Tiger”)US Tiger Securities Inc. breach history | 26,985 |
|
Washington AG, Texas AG, California AG | |
| Cresset Capital ManagementCresset Capital Management breach history | 9,884 |
|
California AG, Texas AG | |
| Fluke CorporationFluke Corporation breach history | 18,517 |
|
Washington AG, California AG, Texas AG | |
| Pivot HealthPivot Health breach history | 8,391 |
|
HHS, Texas AG | |
| Elara CaringElara Caring breach history | 10,490 |
|
HHS, Texas AG | |
| Tulane UniversityTulane University breach history | 80,867 |
|
California AG, Texas AG | |
| American Lending CenterAmerican Lending Center breach history | 123,158 |
|
California AG, Washington AG, Texas AG | |
| Blue Enterprises, Inc. dba Hogan Transports, Inc.Blue Enterprises, Inc. breach history | 45,854 |
|
California AG, Texas AG | |
| MemberSource Credit UnionMemberSource Credit Union breach history | 31,046 |
|
California AG, Texas AG | |
| Berger & Williams, LLPBerger & Williams, LLP breach history | 34,153 |
|
California AG, Texas AG | |
| Western Orthopaedics, P.C.Western Orthopaedics, P.C. breach history | 113,330 |
|
HHS, Texas AG |
Other months in 2026
People affected is the official total from a filing, or “At least” the sum of state filings where no total was filed. Spotted an error? Report a correction.