Google Mail simply called Gmail users have been warned about a data breach as more than 183 million passwords have reportedly been stolen.
Users have been urged to check their accounts and change their passwords as soon as possible.
Troy Hunt, an Australian cyber expert, has revealed that major email providers have been compromised in the latest breach.
The total of 3.5 terabytes of data has been exposed including email addresses, passwords and the websites they were entered into.
Hunt told DailyMail: “All the major providers have email addresses in there.
“They’re from everywhere you could imagine, but Gmail always features heavily.”
If you have emails registered on Yahoo, Outlook, Gmail or any other provider, it is important to check if your password was leaked now.
Users have been directed to go to Have I Been Pwned website to enter their email address in the search bar.
The site will show you if your address has been involved in any breaches in the past decade.
On the assumption that you have been affected, it is recommended to promptly change your password and enable two-factor authentication (2FA).
Reports say the incident occurred in April 2025 but has only now been revealed to the public by the cyber expert.
The expert warned that your email account’s password isn’t the only thing that may have been hacked.
Unique passwords linked to your email account that you use on other websites, such Amazon, eBay, and Netflix, are also at risk.
Hunt said: “Stealer logs expose the credentials you enter into websites you visit then login to.”
A Google spokesperson told the Sun: “This report covers known infostealer activity that targets many different types of Internet activity.
“There is not a new, Gmail-specific attack at play. We protect users from these attacks with layers of defenses, including resetting passwords when we come across credential theft like this.
“We encourage users to boost their own defenses by turning on 2-step verification and adopting passkeys as a simpler and stronger alternative to passwords.”
What are the most common passwords?
After analysing 15 billion passwords from data breaches, the team at CyberNews has published the definitive list of the most common passwords in 2025, which should be avoided at all costs such as:
123456
123456789
qwerty
password
12345
qwerty123
1q2w3e
12345678
111111
1234567890
(GMail logo image: Similar PNG, Google)