NetEase

In October 2015, the Chinese site known as NetEase (located at 163.com) was reported as having suffered a data breach that impacted hundreds of millions of subscribers. Whilst there is evidence that the data itself is legitimate (multiple HIBP subscribers confirmed a password they use is in the data), due to the difficulty of emphatically verifying the Chinese breach it has been flagged as "unverified". The data in the breach contains email addresses and plain text passwords. Read more about Ch

Record: 234.8 million

Cit0day

In November 2020, a collection of more than 23,000 allegedly breached websites known as Cit0day were made available for download on several hacking forums. The data consisted of 226M unique email address alongside password pairs, often represented as both password hashes and the cracked, plain text versions. Independent verification of the data established it contains many legitimate, previously undisclosed breaches. The data was provided to HIBP by dehashed.com.

Record: 226.9 million

Zynga

In September 2019, game developer Zynga (the creator of Words with Friends) suffered a data breach. The incident exposed 173M unique email addresses alongside usernames and passwords stored as salted SHA-1 hashes. The data was provided to HIBP by dehashed.com.

Record: 172.9 million

Adult FriendFinder (2016)

In October 2016, the adult entertainment company Friend Finder Networks suffered a massive data breach. The incident impacted multiple separate online assets owned by the company, the largest of which was the Adult FriendFinder website alleged to be "the world's largest sex & swinger community". Exposed data included usernames, passwords stored as SHA-1 hashes and 170 million unique email addresses. This incident is separate to the 2015 data breach Adult FriendFinder also suffered. The data

Record: 169.7 million

LinkedIn

In May 2016, LinkedIn had 164 million email addresses and passwords exposed. Originally hacked in 2012, the data remained out of sight until being offered for sale on a dark market site 4 years later. The passwords in the breach were stored as SHA1 hashes without salt, the vast majority of which were quickly cracked in the days following the release of the data.

Record: 164.6 million

Dubsmash

In December 2018, the video messaging service Dubsmash suffered a data breach. The incident exposed 162 million unique email addresses alongside usernames and PBKDF2 password hashes. In 2019, the data appeared listed for sale on a dark web marketplace (along with several other large breaches) and subsequently began circulating more broadly. The data was provided to HIBP by a source who requested it to be attributed to "BenjaminBlue@exploit.im".

Record: 161.7 million

Adobe

In October 2013, 153 million Adobe accounts were breached with each containing an internal ID, username, email, encrypted password and a password hint in plain text. The password cryptography was poorly done and many were quickly resolved back to plain text. The unencrypted hints also disclosed much about the passwords adding further to the risk that hundreds of millions of Adobe customers already faced.

Record: 152.4 million

MyFitnessPal

In February 2018, the diet and exercise service MyFitnessPal suffered a data breach. The incident exposed 144 million unique email addresses alongside usernames, IP addresses and passwords stored as SHA-1 and bcrypt hashes (the former for earlier accounts, the latter for newer accounts). In 2019, the data appeared listed for sale on a dark web marketplace (along with several other large breaches) and subsequently began circulating more broadly. The data was provided to HIBP by a source who requ

Record: 143.6 million

Canva

In May 2019, the graphic design tool website Canva suffered a data breach that impacted 137 million subscribers. The exposed data included email addresses, usernames, names, cities of residence and passwords stored as bcrypt hashes for users not using social logins. The data was provided to HIBP by a source who requested it be attributed to "JimScott.Sec@protonmail.com".

Record: 137.3 million

Exactis

In June 2018, the marketing firm Exactis inadvertently publicly leaked 340 million records of personal data. Security researcher Vinny Troia of Night Lion Security discovered the leak contained multiple terabytes of personal information spread across hundreds of separate fields including addresses, phone numbers, family structures and extensive profiling data. The data was collected as part of Exactis' service as a "compiler and aggregator of premium business & consumer data" which they the

Record: 131.6 million