Incidents at named organisations, each linked to the source that reported it: material incident filings companies made to the SEC, breaches verified by Have I Been Pwned, and claims posted by ransomware groups.
This view includes organisations named on ransomware leak sites. Those are the groups’ claims, not confirmed breaches — the organisations have not confirmed them and no filing or verified record supports them.
In April 2026, the luxury fashion e-commerce platform Mytheresa was listed as a victim of the ShinyHunters "pay or leak" extortion group . After the ransom deadline passed, the group publicly released the data which contained 84k unique email addresses. The exposed data also included names, phone numbers, physical addresses, purchases and partial credit card data including card type, last 4 digits and expiry date.
In April 2026, the NSFW AI girlfriend platform My Lovely AI suffered a data breach that exposed over 100k users . The data included user-created prompts and links to the resulting AI-generated images, along with a small number of Discord and X usernames.
In June 2026, Moody Bible Institute was targeted by a ShinyHunters "pay or leak" extortion campaign . Over 2.3M unique email addresses and other personal data were later published publicly, including names, physical addresses, phone numbers, dates of birth and other information relating to donors, supporters, students and alumni. In their disclosure notice , Moody advised that they had "engaged both internal and external cybersecurity experts to thoroughly investigate the matter".
In August 2025, the Swedish system supplier Miljödata was the victim of a ransomware attack . Following the attack, data was subsequently published on the dark web and included 870k unique email addresses across various compromised files. Data also included names, phone numbers, physical addresses, dates of birth and government-issued personal identity numbers.
In April 2026, education company McGraw Hill confirmed a data breach following an extortion attempt . Attributed to a Salesforce misconfiguration, the company stated the incident exposed "a limited set of data from a webpage hosted by Salesforce on its platform". More than 100GB of data was later publicly distributed, containing 13.5M unique email addresses across multiple files, with additional fields such as name, physical address and phone number appearing inconsistently across some records.
In April 2026, the commercial real estate brokerage firm Marcus & Millichap was named as one of multiple alleged victims of the ShinyHunters hacking and extortion group . Data alleged to have been obtained from the company was subsequently released publicly and included 1.8M unique email addresses, along with names, phone numbers and employment-related information including employer, job title and physical company address. In their disclosure notice , Marcus & Millichap advised that data which may have been accessed appeared limited to "company forms, templates, marketing materials, and general contact information".
In August 2026, Manchester Airports Group (MAG) disclosed a data breach impacting their services . The incident was later claimed by the FulcrumSec hacking group , who subsequently published email addresses and phone numbers relating to 8.8M customers of Manchester, Stansted and East Midlands airports. The data contained personal information relating to airport services, including vehicle registrations and parking history, Fast Track purchases and lounge bookings. In their disclosure notice , MAG advised that "at no point has passenger safety or aviation security been compromised".
In June 2026, the sports and entertainment company Madison Square Garden Sports was the target of a ShinyHunters "pay or leak" extortion campaign . The group later published the alleged data, which included almost 10M unique email addresses spanning staff and customers, along with extensive personal, employment and customer relationship information.
In February 2026, the couples and relationship app Lovora allegedly suffered a data breach that exposed 496k unique email addresses. The data also included users’ display names and profile photos, along with other personal information collected through use of the app. The app’s maker, Plantake, did not respond to multiple attempts to contact them about the incident.
In April 2026, the commercial residential and ISP proxy network LegionProxy suffered a data breach . The incident exposed 10k email addresses, bcrypt password hashes, names and purchases.
In August 2022, the Latest Pilot Jobs website suffered a data breach that later appeared on a popular hacking forum before being redistributed as part of a larger corpus of data . The data included 119k unique email addresses along with names, usernames and unsalted MD5 password hashes.
In February, the AI-powered comic generation platform KomikoAI suffered a data breach . The incident exposed 1M unique email addresses along with names, user posts and the AI prompts used to generate content. The exposed data enables the mapping of individual AI prompts to specific email addresses.
In March 2021, the Russian online streaming service KinoKong suffered a data breach that was later redistributed as part of a larger corpus of data . The breach exposed over 800k unique email addresses along with names, usernames, IP addresses and MD5 password hashes.
In April 2026, the American insurance holding company Kemper Corporation was named by the ShinyHunters ransomware group in a "pay or leak" extortion campaign . The attackers allegedly accessed Kemper's Salesforce environment via social engineering as part of a broader campaign targeting hundreds of organisations using the same method. The group later published tens of gigabytes of data they claimed included internal directory data, Salesforce records and Stripe payment logs. Among the 269k unique email addresses were names, phone numbers, physical addresses and partial payment card data including the last 4 digits, expiry dates and card brands. Kemper confirmed the incident and stated they had engaged third-party cybersecurity experts and notified law enforcement.
In June 2026, a collection of accumulated stealer logs from various sources was added to HIBP. The corpus comprised 56M unique email addresses across hundreds of millions of stealer log records. The data also contained 124M unique passwords, which have been added to Pwned Passwords and are now searchable. Individuals can view any records captured against their email address in the stealer logs section of their dashboard . Organisations can see logs affecting their domain via the stealer logs API .
In June 2026, retailer JCPenney and associated brands were targeted in a ShinyHunters "pay or leak" extortion campaign . Data allegedly obtained from JCPenney through the exploitation of a critical zero-day vulnerability in Oracle PeopleSoft was later published publicly. The exposed records indicated they primarily related to internal HR systems and impacted current and former employees. The data included 368k corporate and personal email addresses, names, dates of birth, Social Security numbers, phone numbers and home addresses.
In November 2025, the International Kiteboarding Organization suffered a data breach that exposed 340k user records . The data was subsequently listed for sale on a hacking forum and included email addresses, names, usernames and in many cases, the user's city and country.
In June 2026, Inter-Con Security was targeted in a ShinyHunters “pay or leak” extortion campaign . The group subsequently published data it alleged was taken from the company, including 276k unique email addresses along with names, physical addresses, job titles and phone numbers. The data encompassed a combination of contacts, internal users and leads.
In January 2026, data allegedly scraped via an Instagram API was posted to a popular hacking forum . The dataset contained 17M rows of public Instagram information, including usernames, display names, account IDs, and in some cases, geolocation data. Of these records, 6.2M included an associated email address, and some also contained a phone number. The scraped data appears to be unrelated to password reset requests initiated on the platform , despite coinciding in timeframe. There is no evidence that passwords or other sensitive data were compromised.
In March 2026, the student information system Infinite Campus was targeted in a ShinyHunters "pay or leak" extortion campaign . The group subsequently published data they alleged was taken from Infinite Campus, containing 137k unique email addresses along with names, phone numbers, physical addresses and support tickets. Infinite Campus subsequently sent notifications , advising that the exposed data largely consisted of "names and contact information for school staff" and that "the majority is directory information commonly found on school websites".
In June 2026, Houston City College was the target of a ShinyHunters "pay or leak" extortion campaign . Data allegedly obtained from the college was later published publicly and included 832k unique email addresses along with names, addresses, phone numbers, academic records, and other personal information relating to both current students and alumni.
In April 2020, now defunct Brazilian e-commerce platform HomeRefill suffered a data breach that was later redistributed as part of a larger corpus of data . The data included 187k unique email addresses along with names, phone numbers, dates of birth and salted password hashes.
In July 2025, the sexual healthcare product maker Hello Cake suffered a data breach . The data was subsequently posted on a public hacking forum and included 23k unique email addresses along with names, phone numbers, physical addresses, dates of birth and purchases.
In March 2026, Hallmark suffered an alleged breach and subsequent extortion after attackers gained access to data stored within Salesforce. The data was later published after the extortion deadline passed, exposing 1.7M unique email addresses across both Hallmark and the Hallmark+ streaming service, along with names, phone numbers, physical addresses and support tickets.
In June 2026, a party claiming to have access to data from Goose Creek Candle Company sent emails to a number of the company's customers , claiming the company had a security vulnerability and suffered a data breach. The data was subsequently sent to Have I Been Pwned and contained 6.6M unique email addresses along with names, phone numbers, physical addresses, order IDs and total spent. The data appears to have been obtained from the company's Shopify instance. Goose Creek is aware of the reports but was unable to provide Have I Been Pwned with any further information at the time of publication.
Filings come from SEC EDGAR and are filtered to 8-K submissions that declare Item 1.05, not merely mention it. Breach records come from Have I Been Pwned. Ransomware claims come from RansomLook, used under CC BY 4.0; we store metadata only and never leak links.