Carnival data breach
7,531,359 accounts exposed.
Check whether your email is included on Have I Been Pwned.
What was exposed
What to do
- Expect more phishing emails that mention this service. Do not click links in them; go to the site directly.
- Turn on two-step verification wherever it is offered, and use a password manager.
About this breach
In April 2026, the notorious hacking collective ShinyHunters claimed they had obtained a substantial volume of data belonging to the Carnival cruise operator and attempted to extort the organisation to prevent the data from being leaked. The following week, the group published the data publicly, which contained 8.7M records with 7.5M unique email addresses. The data contained fields indicating it related to the Mariner Society loyalty program run by Holland America, a cruise line brand under Carnival, and included names, dates of birth, genders and data relating to status within the loyalty program. Carnival acknowledged a phishing incident involving a single user account and advised they were working to better understand the scope of the unauthorised activity.