GitHub admits major source code leak after 3,800 internal repositories breached

Microsoft’s GitHub has suffered what appears to be its biggest ever security breach after confirming that attackers exfiltrated code from around 3,800 of the company’s internal repositories. News of the incident first emerged on May 19, when GitHub said it was investigating “unauthorized access.” Hours later, the company’s X account confirmed the worst: “Yesterday we detected and contained a compromise of an employee device involving a poisoned VS [Visual Studio] Code extension.