Companies House is a British government agency that operates the registry for all U.K. companies. There was a flaw that allowed users to view the dashboards of other companies, which could reveal data including dates of birth, home addresses, and email addresses. This leak could've impacted as many as five million companies over five months, allowing attackers to change data or export records.
This is a companion discussion topic for the original entry at https://www.privacyguides.org/news/2026/03/20/data-breach-roundup-mar-13-19-2026