DentaQuest
15 million patient records stolen in largest healthcare data breach of 2026 (May incident)
2026 continues the year-over-year growth trend in confirmed disclosures. The list below updates as new breaches are reported by Verizon DBIR partners and major security news outlets.
15 million patient records stolen in largest healthcare data breach of 2026 (May incident)
Exposed GitHub repository included internal credentials and files
Tens of thousands of Queensland students and teachers data compromised in major education technology breach
2 million private member records exposed and offered for sale by hackers
2 million private member records of African National Congress exposed by hacker group
Learning management platform breach affected schools nationwide; data extortion attack disrupted classes
Major cyber breach affecting tens of thousands of Queensland students and teachers globally
Tens of thousands of students and teachers affected in one of most significant global education technology data breaches
Major cyber breach affecting tens of thousands of Queensland students and teachers in one of most significant global education tech data breaches
Hospital patient records for ~13,000 patients exposed via cyberattack on law firm
15 million patients impacted in largest healthcare breach of 2026, second-largest dental benefits administrator in U.S.
Tens of thousands of students and teachers caught in major cyber breach of education technology system
Tens of thousands of Queensland students and teachers affected in significant education technology data breach
Cyberattack exposed approximately 607,000 records containing sensitive government education data.
Ransomware attack disrupted finals week and affected thousands of schools
Major cyber breach affecting tens of thousands of students and teachers in one of most significant global education tech breaches
ShinyHunters claimed to have stolen 600K records from UC Berkeley's learning management platform
Tens of thousands of students and teachers affected in one of most significant global education technology breaches
Data breach exposed Medicare numbers, treatment details, and pathology results; records could be sold on dark web
Tens of thousands of student and teacher records compromised in major education technology breach
System breach exposing documents related to franchises confirmed after ShinyHunters claims
Unauthorized third party gained access to systems storing franchisee documents in confirmed data breach
Ransomware attack disrupted finals week across thousands of schools including ISU
Massive data breach affecting schools nationwide; extortion attack on education platform