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# Malakoff Humanis links leaked health data to August attack on IGA
- URL: https://thecoverwire.com/malakoff-humanis-health-data-published-iga-gestion/
- Published: 2026-10-18T09:30:00.000Z
- Updated: 2026-11-02T11:48:07.000Z
- Description: A hacker posted 16,556 health claims documents that the French insurer traces to an attack on a provider managing about 2,000 insureds.
- Author: CoverWire
- Tags: Cyber, #desk-risk

French insurer Malakoff Humanis has linked health data published on 17 October to an August cyberattack on administrator IGA, a provider handling about 2,000 of the group's insureds.

Cyberattaque.org reported that an actor called ChimeraZ published what it presented as a partial set of 16,556 documents. The site said the material contained information about insureds, reimbursements and care.

Malakoff Humanis said it became aware of the attack on IGA on 11 August.

In a statement carried by cyberattaque.org, Malakoff Humanis said: "Malakoff Humanis has become aware of a data theft claim published on 17 October. The published data relates to a cyberattack that targeted one of our administration providers (IGA), which manages around 2,000 of our Group's insureds, and which we became aware of on 11 August."

The English translation is Coverwire's. The insurer said it followed the required procedure immediately after the incident. That included notifying the CNIL and other competent authorities, and informing insureds.

Malakoff Humanis said its teams were analysing the newly published material to verify its authenticity, origin and scope.

It also asked insureds to watch for unusual emails, text messages or calls. An adviser will never ask for a password or security codes, the group said.

Cyberattaque.org said its analysis found hospital care requests and approvals, reimbursements, and optical, dental and pharmacy documents. It also reported names, addresses, dates of birth, member numbers and French Social Security numbers.

More than 800 entries mentioned IBANs or bank statements, according to the site, although it said not every account belonged to an insured person. Some documents were dated 7 and 8 August 2026.

Those details come from cyberattaque.org and have not been confirmed by Malakoff Humanis.

Malakoff Humanis said it was still checking the files' authenticity and origin.

Related coverage: [Brit adds cyber to Acturis Package for brokers at commercial renewal](https://thecoverwire.com/brit-cyber-launches-on-acturis-package/) and [Old Mutual says provider error may have exposed customer phone numbers](https://thecoverwire.com/old-mutual-provider-configuration-error-customer-data/).

## Sources

- [cyberattaque.org: Malakoff Humanis, 16 556 documents de santé exposent les patients après une cyberattaque](https://www.cyberattaque.org/malakoff-humanis-16-556-documents-de-sante-exposent-les-patients-apres-une-cyberattaque/?ref=thecoverwire.com)