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Recently added breaches
Collection #1 accounts
In January 2019, a large collection of credential stuffing lists (combinations of email addresses and passwords used to hijack accounts on other services) was discovered being distributed on a popular hacking forum. The data contained almost 2.7 billion records including 773 million unique email addresses alongside passwords those addresses had used on other breached services. Full details on the incident and how to search the breached passwords are provided in the blog post The 773 Million Record "Collection #1" Data Breach.
Verifications.io acounts
In February 2019, the email address validation service verifications.io suffered a data breach. Discovered by Bob Diachenko and Vinny Troia, the breach was due to the data being stored in a MongoDB instance left publicly facing without a password and resulted in 763 million unique email addresses being exposed. Many records within the data also included additional personal attributes such as names, phone numbers, IP addresses, dates of birth and genders. No passwords were included in the data. The Verifications.io website went offline during the disclosure process, although an archived copy remains viewable.
Onliner Spambot accounts
In August 2017, a spambot by the name of Onliner Spambot was identified by security researcher Benkow moʞuƎq. The malicious software contained a server-based component located on an IP address in the Netherlands which exposed a large number of files containing personal information. In total, there were 711 million unique email addresses, many of which were also accompanied by corresponding passwords. A full write-up on what data was found is in the blog post titled Inside the Massive 711 Million Record Onliner Spambot Dump.
Exploit.In
In late 2016, a huge list of email address and password pairs appeared in a "combo list" referred to as "Exploit.In". The list contained 593 million unique email addresses, many with multiple different passwords hacked from various online systems. The list was broadly circulated and used for "credential stuffing", that is attackers employ it in an attempt to identify other online systems where the account owner had reused their password. For detailed background on this incident, read Password reuse, credential stuffing and another billion records in Have I Been Pwned.
In April 2021, a large data set of over 500 million Facebook users was made freely available for download. Encompassing approximately 20% of Facebook's subscribers, the data was allegedly obtained by exploiting a vulnerability Facebook advises they rectified in August 2019. The primary value of the data is the association of phone numbers to identities; whilst each record included phone, only 2.5 million contained an email address. Most records contained names and genders with many also including dates of birth, location, relationship status and employer.
MySpace
In approximately 2008, MySpace suffered a data breach that exposed almost 360 million accounts. In May 2016 the data was offered up for sale on the "Real Deal" dark market website and included email addresses, usernames and SHA1 hashes of the first 10 characters of the password converted to lowercase and stored without a salt. The exact breach date is unknown, but analysis of the data suggests it was 8 years before being made public.
Largest breaches
Ticketek
In May 2024, the Australian event ticketing company Ticketek reported a data breach linked to a third party cloud-based platform. The following month, the data appeared for sale on a popular hacking forum and was later linked to a series of breaches of the Snowflake cloud storage service. The data contained almost 30M rows with 17.6M unique email addresses alongside names, genders, dates of birth and hashed passwords.
Advance Auto Parts
In June 2024, Advance Auto Parts confirmed they had suffered a data breach which was posted for sale to a popular hacking forum. Linked to unauthorised access to Snowflake cloud services, the breach exposed a large number of records related to both customers and employees. In total, 79M unique email addresses were included in the breach, alongside names, phone numbers, addresses and further data attributes related to company employees.
Zadig & Voltaire
In June 2024, a data brach sourced from French fashion brand Zadig & Voltaire was publicly posted to a popular hacking forum. The data included names, email and physical addresses, phone numbers and genders. When contacted about the incident, Zadig & Voltaire advised the incident had occurred more than 6 months ago and that "all measures were taken quickly".
Operation Endgame
In May 2024, a coalition of international law enforcement agencies took down a series of botnets in a campaign they coined "Operation Endgame". Data seized in the operation included impacted email addresses and passwords which were provided to HIBP to help victims learn of their
pcTattletale
In May 2024, the spyware service pcTattletale suffered a data breach that defaced the website and posted tens of gigabytes of data to the homepage, allegedly due to pcTattletale not responding to a previous security vulnerability report. The breach exposed data including membership records, infected PC names, captured messages and extensive logs of IP addresses and device information.
Tappware
In April 2024, a substantial volume of data was taken from the Bangladeshi IT services provider Tappware and published to a popular hacking forum. Comprising of 95k unique email addresses, the data also included extensive labour information on local citizens including names, physical addresses, job titles, dates of birth, genders and scans of government issued national identity (NID) cards.