Carnival Data Breach

What Happened

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.

Compromised Data

Dates of birth
Email addresses
Genders
Geographic locations
Loyalty program details
Names
Salutations

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Breach Overview

Recommended Actions

Change Your Password

If you haven’t already changed the password affected by this breach, do so immediately on every account where it was used.

Enable Two-Factor Authentication

Wherever 2FA is supported, add an extra layer of security to your account.

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