What was exposed, when it happened, and which databases confirm it.
- accounts
- 2,553,599
- Breached
- May 23, 2026
- Last Update
- June 3, 2026
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
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What happened
In May 2026, the dental benefits administrator DentaQuest was the target of a ShinyHunters "pay or leak" extortion campaign that resulted in the group publicly publishing hundreds of gigabytes of data allegedly obtained from the company. The data included 2.6M unique email addresses along with names, addresses and phone numbers. Much of the data appeared in healthcare enrollment files (ASC X12 transaction sets) with some containing Medicaid IDs, while additional data appeared in member records and related files. DentaQuest acknowledged "a cybersecurity incident involving unauthorized access to a limited portion of our network", and advised they had contained the attack and mitigated the threat.
Compromised Info
- Dates of birth
- Email addresses
- Genders
- Government issued IDs
- Health insurance information
- Names
- Phone numbers
- Physical addresses
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- HIBP
FAQ
What was leaked in the DentaQuest breach?
The DentaQuest breach exposed: Dates of birth, Email addresses, Genders, Government issued IDs, Health insurance information, Names, Phone numbers, and Physical addresses.
When did the DentaQuest breach happen?
The DentaQuest breach was disclosed on May 23, 2026 and affected 2,553,599 records.
Am I affected by the DentaQuest breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the DentaQuest leak.