The Mathspace data breach has affected 1,079,819 people in Australia and New Zealand after unauthorized parties accessed an internal reporting system and downloaded user information. Mathspace confirmed the security incident on September 3, 2026, and said the affected records involve students, parents or guardians, teachers, and Mathspace staff. 

The company said names, email addresses, and account details were exposed, but customer passwords, single sign-on (SSO) tokens, and other authentication credentials were not. There is currently no evidence that the information has been published, sold, distributed, or otherwise misused. The attacker’s identity remains unknown. 

How the Mathspace Data Breach Happened? 

The security incident resulted from a vulnerability in Mathspace’s self-hosted Metabase installation, which was used for internal reporting. The flaw allowed attackers to obtain administrator access without a legitimate login. 

Metabase issued a critical security advisory and patched versions on August 6. Mathspace said its vulnerability-notification process failed to identify and escalate that advisory. The company later updated its Metabase instance on August 29 after seeing a subsequent notice. 

An investigation found unauthorized access dating to August 10, Australian Eastern Standard Time. Information was downloaded from Mathspace’s Australian reporting database on August 27. Historical log reviews confirmed the unauthorized access on September 3, before the update had been applied. Mathspace also acknowledged that it did not complete additional compromise checks recommended for potentially affected systems at the time of the update. 

What Information was Exposed? 

The exported data included user IDs, usernames, first and last names, email addresses, country, time zone, user type, email-verification status, last-active date, last-login date and joining date. Not every field appeared for every affected person. 

Mathspace said the exposure went beyond names and email addresses. User IDs are internal identifiers, including those linked to student accounts. However, no academic records, learning activities, results, assessments, password hashes, authentication tokens, SSO credentials or API credentials were exposed. 

The data did not contain records directly linking accounts to schools, although Mathspace said school affiliations could potentially be inferred where identifiable email domains were used. Former or inactive users may also be affected because retained information could remain in the reporting database. 

What Users Should Know After the Security Incident? 

Names, email addresses, and account details could make phishing or impersonation attempts more convincing. Users have been advised to independently verify unexpected messages, avoid unfamiliar links and attachments, and never provide passwords or verification codes in response to unsolicited communications. 

Mathspace is not requiring password resets because customer authentication credentials were not exposed. However, anyone who reused a Mathspace password elsewhere should change those reused passwords to unique ones and monitor accounts for unusual activity. 

Response to the Mathspace Data Breach 

After confirming the breach on September 3, Mathspace took Metabase offline, revoked its API keys, disabled Metabase database-access accounts in its Australian and US Snowflake environments, and changed passwords for its Metabase Cloud SQL databases. The company also copied the application database and exported access logs for investigation. Metabase remains offline while recovery and compromise checks continue. 

Mathspace began notifying school contacts on September 4 and started notifying affected individuals on September 6, earlier than the date previously communicated to schools. 

On September 4, the security incident was reported to Australia’s Office of the Australian Information Commissioner, the Australian Signals Directorate’s Australian Cyber Security Centre, New Zealand’s Office of the Privacy Commissioner and National Cyber Security Centre, as well as Australian state and territory education departments.