Data breaches → Naz.API
Was your data in the Naz.API breach?
2023 · ~70,840,771 accounts exposedCritical severity · 10/10
Naz.API suffered a data breach in 2023 that exposed around 70,840,771 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 September 2023, over 100GB of stealer logs and credential stuffing lists titled "Naz.API" was posted to a popular hacking forum. The incident contained a combination of email address and plain text password pairs alongside the service they were entered into, and standalone credential pairs obtained from unnamed sources. In total, the corpus of data included 71M unique email addresses and 100M unique passwords.
Breach details sourced from Have I Been Pwned, the industry-standard breach database. 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 Naz.API breach exposed and what each item actually enables:
Attackers replay leaked passwords across other sites (“credential stuffing”). Because most people reuse passwords, one leak often unlocks email, shopping and banking accounts elsewhere.
Puts you on spam and phishing lists, and confirms to attackers that you hold an account with this service — which makes impersonation emails more believable.
What to do if you were affected
These steps are ordered for this specific breach — the most urgent action given what leaked comes first.
- Passwords: Change this password everywhere you have reused it, starting with your email account — whoever controls your email can reset everything else.
- Email addresses: Treat any message referencing this service with suspicion, and never act on links in unexpected emails.
- Check whether your own email appears in this breach — run a free scan to confirm before you spend time on the steps above.
How urgent is this now?
This data has been circulating for around 3 years, which means it has been copied, combined with other leaks and indexed by search tools many times over.
Passwords are the reason breach age matters less than people expect. Leaked credentials are compiled into wordlists that get tried against new services for years afterwards, so a password exposed here is unsafe to use anywhere, ever again.
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 Naz.API breach?
The Naz.API breach exposed passwords, email addresses. Attackers replay leaked passwords across other sites (“credential stuffing”). Because most people reuse passwords, one leak often unlocks email, shopping and banking accounts elsewhere.
How many people were affected by the Naz.API breach?
Around 70,840,771 accounts were exposed, making it a very large breach by any measure.
What should I do if I had a Naz.API account?
Change this password everywhere you have reused it, starting with your email account — whoever controls your email can reset everything else. 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 Naz.API breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.
- Was your data in the The Post Millennial breach? (2024, ~56,973,345 accounts)
- Was your data in the 1win breach? (2024, ~96,166,543 accounts)
- Was your data in the Eye4Fraud breach? (2023, ~16,000,591 accounts)
- Was your data in the Internet Archive breach? (2024, ~31,081,179 accounts)
- Was your data in the Stealer Logs Posted to Telegram breach? (2024, ~26,105,473 accounts)
- Was your data in the Genesis Market breach? (2023, ~8,000,000 accounts)