On December 6, 2025, the LockBit5 ransomware group listed marriott.com on its leak site, claiming to have exfiltrated internal files from the global hotel chain during a ransomware attack. The posting affects anyone who has stayed at a Marriott property, used its booking systems, or maintained a Marriott Bonvoy account, as the exposed data may contain personal details that can be linked to real-world identities.
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What Public Reporting Shows
Public reporting indicates that LockBit5 added the Marriott entry to its dark-web leak portal on December 6, 2025. The group states it obtained internal files but has not yet published a full data sample or specified the exact number of records involved. Available reporting describes the incident as a ransomware attack in which the attackers encrypted systems and exfiltrated data before demanding payment. Marriott has not released an official statement confirming the breach at the time of this writing, leaving affected customers to rely on the attackers’ claims and third-party trackers.
The leak site posting carries the typical countdown format used by the group, although no firm extortion deadline has been widely reported. Data types mentioned include internal files; whether customer names, addresses, payment details, or loyalty-program information were taken remains unconfirmed by independent sources.
Why This Matters for You and Your Family
When a major hotel chain’s internal systems are breached, the ripple effects reach ordinary travelers and their households. Reservation records often contain home addresses, phone numbers, email accounts, and loyalty numbers that families reuse across travel, banking, and shopping sites. If those details surface, identity thieves can build convincing profiles to open fraudulent accounts or impersonate you during customer-service calls. Children’s information tied to family bookings can also be exposed, creating long-term risks that parents must address directly.