Over 183 Million Gmail Passwords Allegedly Stolen in Massive Data Breach

Gmail users have been urged to review their accounts after reports that more than 183 million passwords were stolen in a recent data breach.

Australian cybersecurity expert Troy Hunt, who disclosed the incident, described it as a “vast corpus” of breached data totaling 3.5 terabytes—roughly equivalent to 875 full-length HD movies.

Hunt explained that the breach affects not only Gmail but also other major email providers like Outlook and Yahoo. “They’re from everywhere you could imagine, but Gmail always features heavily,” he told the Daily Mail.

Although the breach occurred in April, it was only recently reported on Hunt’s website, Have I Been Pwned (HIBP). The compromised data reportedly includes 183 million unique email addresses, the sites they were used on, and the corresponding passwords.

According to Hunt, this is not a single breach but a compilation of “stealer logs”—data files generated by malware that continuously collect personal information. “Stealer logs are more of a firehose of data that’s constantly spewing personal info all over the place,” Hunt explained. “Once the bad guys have your data, it often replicates across multiple platforms and channels.”

Hunt advised users to check if their accounts have been compromised by visiting the Have I Been Pwned website, entering their email address, and clicking the “Check” button to see any breaches affecting them.