GitHub Says 3,800 Repositories Breached—TeamPCP Hackers Demand $50,000

InnovationCybersecurityGitHub Says 3,800 Repositories Breached—TeamPCP Hackers Demand $50,000ByDavey Winder,Senior Contributor.Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst.Follow AuthorMay 20, 2026, 09:26am EDTMay 20, 2026, 09:27am EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.GitHub confirms 3,800 repositories breached.Anadolu via Getty ImagesGitHub, the cloud-based hosting service used by software developers to store and manage code, has confirmed a major security incident involving an employee. A May 20 posting to the X social media platform by the GitHub account has stated that “the attacker’s current claims of 3,800 repositories are directionally consistent with our investigation so far.” The good news, if you can call it that, is that the investigation appears to suggest that the TeamPCP hackers have only exfiltrated GitHub-internal repositories. The bad news, however, is that TeamPCP reckons it now has access to GitHub's source code.ForbesMicrosoft Confirms Active 0-Day Exploit—Check Emergency MitigationBy Davey WinderTeamPCP Hacking Group Put Stolen GitHub Data Up For SaleThe hacking of GitHub, which Microsoft acquired for $7.5 billion in 2018, is a big deal no matter which way you cut it. Used by 4 million organizations and 180 million developers, the cloud platform has more than 400 million code repositories in total. You might think, therefore, that a breach involving just 3,800 of them isn’t all that newsworthy. But context is everything, and in this case, that context comes in twofold: the repositories appear to be internal GitHub ones, and the breach itself was inadvertently enabled by a GitHub employee. The compromise was detected by GitHub security teams on May 19, sparking an immediate investigation. GitHub said then that it had “no evidence of impact to customer information stor...