Trello Data Breach Exposes 15.1 Million User Emails

Trello, the project management software owned by Australian tech company Atlassian, has suffered a security incident. Lists containing approximately 15.1 million Trello user email addresses are circulating on dark web forums. Reports indicate the data was obtained by scraping Trello's platform, with datasets including usernames, full names, and other account details. Trello is widely used across startups, with 2 million teams worldwide relying on it for dashboards, project tracking, and task management. Users can check if they are affected via the website Have I Been Pwned, which has added the dataset. Trello/Atlassian has not yet issued an official statement or explanation. While direct financial damage is unlikely, the leaked emails and names could be used for credential stuffing attacks or phishing campaigns targeting Trello users, potentially exposing sensitive corporate information like roadmaps and client data.