Everest ransomware claims breach of Liberty Mutual insurance data
The Everest ransomware group listed Liberty Mutual on its leak site, claiming theft of over 100 GB of policyholder data including names, addresses, policy numbers, and financial details for tens of thousands of individuals and brokers. The data was allegedly collected in January 2026. Liberty Mutual has not publicly commented.
- names
- addresses
- policy numbers
- financial information
- insurance records
What happened
On April 30, 2026, the Everest ransomware group added Liberty Mutual to its public leak site, asserting that it had stolen more than 100 GB of policyholder data. The group claims the information was obtained in January 2026 and includes names, physical addresses, policy numbers, financial details, and insurance records belonging to tens of thousands of individuals and insurance brokers.
Liberty Mutual has not issued a public statement confirming or denying the breach. Everest’s posting follows the now-familiar ransomware pattern of initial access, data exfiltration, and subsequent extortion through the threat of publication. The volume and sensitivity of the records posted suggest the attackers gained access to backend systems that store core customer and broker information.
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