Groupe MGEL
CriticalConfirmedHealthcare
On September 12, 2026, an individual using the alias RedStone put databases attributed to Groupe MGEL up for sale on a cybercriminal forum. MGEL is a French mutual insurer covering primarily students under that name and a wider public under its Mutuelle Vitalité Santé brand. The seller claims 16 databases and roughly 38.8 million rows, including 603,845 email addresses, 685,676 phone numbers, more than 1.1 million full names and 450,806 unique IBANs, alongside dates of birth, postal addresses, national health insurance numbers, treating-physician information, and, in some tables, passwords stored in plaintext or hashed form.
The direct association of names, contact details and IBANs in a single file would let a malicious actor run targeted phishing campaigns impersonating the insurer or a bank, or attempt fraudulent direct debits.
- Disclosed on
- September 12, 2026
- Accounts affected
- 594,414
- Sector
- Healthcare
- Country
- France
- Cause
- Undisclosed
Exposed data
- Email address
- Full name
- Phone number
- Postal address
- Date of birth
- Connection data (IP, logs)
- Employment data
- Password (hashed)
- Password (plaintext)
- Banking data (IBAN, card)
- Social security number
- Health data
You are only affected if you had an account or an order with this organisation.
What you can do
- Change that password — and everywhere you reused it. That is how a leak spreads to your other accounts.
- Turn on two-factor authentication on the affected accounts: a stolen password is then no longer enough.
- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- Watch your statements. On any unknown debit, block the card and request a refund — French law (art. L133-18) entitles you to it.
- These documents enable identity theft, and cannot be reissued at will. Keep the notification letter: it proves where the leak came from if an account is opened in your name.
- Health data is “special category” data under the GDPR: a leak opens a right to compensation, and the organisation must notify the DPA within 72 hours.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.
Sources
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