Major Australia Data Breaches
Select any breach below to register your interest. We will contact you if a class action opens that you may be eligible for.
Medibank
2022 • 9.7 million records affected
Hackers accessed and published sensitive health records of Medibank and ahm customers, including data about sensitive medical conditions and procedures.
Data Exposed
Names, dates of birth, Medicare numbers, health claims data, contact details
Optus
2022 • 9.8 million records affected
A cyberattack exposed personal information of current and former Optus customers. Affected data included government ID numbers for approximately 2.8 million people.
Data Exposed
Names, dates of birth, phone numbers, email addresses, home addresses, passport and licence numbers
Latitude Financial
2023 • 14 million records affected
One of Australia's largest ever data breaches, affecting Latitude Financial customers and former customers across Australia and New Zealand.
Data Exposed
Names, addresses, dates of birth, driver's licence numbers, passport numbers, financial statements
MediSecure
2024 • 12.9 million records affected
Prescription delivery service MediSecure suffered a ransomware attack exposing highly sensitive health and personal information of patients.
Data Exposed
Names, dates of birth, addresses, Medicare numbers, prescription information
Canva
2019 • 137 million records affected
Australian graphic design platform Canva was breached, exposing account data for over 137 million registered users worldwide.
Data Exposed
Usernames, real names, email addresses, city/country data, bcrypt-hashed passwords
HWL Ebsworth
2023 • Extensive government and corporate files records affected
Major Australian law firm HWL Ebsworth was targeted by the ALPHV/BlackCat ransomware group, exposing sensitive files from dozens of government agencies and corporate clients.
Data Exposed
Legal documents, government agency data, client files, internal correspondence
Australian National University (ANU)
2018 • 200,000 records affected
ANU suffered a sophisticated cyberattack that exposed 19 years of personal data for students, staff and visitors.
Data Exposed
Names, addresses, dates of birth, phone numbers, personal email addresses, emergency contact details, tax file numbers, payroll information, bank account details, student academic records
Ticketmaster / Live Nation
2024 • 560 million (global) records affected
Cloud data provider Snowflake was breached, exposing data from Ticketmaster and other major companies. Millions of Australian customers were included.
Data Exposed
Names, addresses, phone numbers, partial payment card data, ticket purchase history
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About this page
Information on this page is general in nature and does not constitute legal advice. ClaimBar tracks class action settlements and provides updates. Always seek professional legal advice for your specific circumstances. Data breach information is sourced from public records, regulatory disclosures, and news reports. Record counts are approximate. The existence of a breach does not guarantee you are entitled to compensation — eligibility depends on the specific circumstances and the outcome of any legal proceedings.