Was your data in the Carnival breach?
Check whether your email address was in it
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Carnival (carnivalcorp.com) suffered a data breach in 2026 that exposed around 7,531,359 accounts. If you had an account, some of your personal data may be circulating in leaked databases. The fastest way to know is to check your own email — free, in about 30 seconds, no password required.
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.
Breach record from Have I Been Pwned, CC BY 4.0. Risk analysis by Nullivo.
What was exposed, and why it matters
Not all breaches carry the same risk — what matters is which fields leaked. Here is what the Carnival breach exposed and what each item actually enables:
Also listed in this breach: Dates of birth, Email addresses, Genders, Geographic locations, Loyalty program details, Names, Salutations.
What to do if you were affected
These steps are ordered for this specific breach — the most urgent action given what leaked comes first.
- Dates of birth
Never confirm your date of birth to an inbound caller — hang up and dial the organisation back on a published number. - Location data
Review location sharing on the accounts you still hold with this service. - Names and usernames
Search your usual username to see what else it exposes, and use distinct handles for sensitive accounts. - Email addresses
Treat any message referencing this service with suspicion, and never act on links in unexpected emails. - Confirm you were actually in it
Run a free scan before you spend time on the steps above.
How urgent is this now?
This breach is recent, so the data is actively traded and the risk is at its highest right now.
Remember: a breach can’t be “un-leaked” — once a database is out, it exists in countless copies. The goal is to make the leaked data useless: change what can be changed, lock down what can’t, and remove what has been republished.
Frequently asked questions
What data was exposed in the Carnival breach?
The Carnival breach exposed dates of birth, location data, names and usernames, email addresses. Date of birth is a permanent identifier used to verify identity by phone. Combined with a name and address it is often enough to impersonate you.
How many people were affected by the Carnival breach?
Around 7,531,359 accounts were exposed, making it a large breach.
What should I do if I had a Carnival account?
Never confirm your date of birth to an inbound caller — hang up and dial the organisation back on a published number. You can check whether your own email appears in this breach with a free Nullivo scan — no password required.
Breaches that exposed similar data
If the Carnival breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.