Медицинская лаборатория Гемотест (Gemotest) data breach: 6.3M accounts exposed
Severity: high · Patch status: no-fix-needed · Since 2025-12-24
In April 2022, Russian pharmaceutical company Gemotest suffered a data breach that exposed 31 million patients. The data contained 6.3 million unique email addresses along with names, physical addresses, dates of birth, passport and insurance numbers. Gemotest was later fined for the breach. Exposed data: dates of birth, email addresses, genders, government issued ids, health insurance information, names, passport numbers, physical addresses. The breach dates from Apr 22, 2022; Have I Been Pwned loaded it on Dec 24, 2025.
What to do
- If you had a Медицинская лаборатория Гемотест (Gemotest) account, change its password and the password of any other account that reused it.
- Turn on multi-factor authentication wherever it is offered.
- Check whether your addresses are in this breach at https://haveibeenpwned.com.
- Expect targeted phishing that quotes the leaked details; verify any unexpected contact out of band.
Sources
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