GitHub confirmed on May 20 that a poisoned VS Code extension installed on an employee’s device gave attackers access to roughly 3,800 internal repositories at the Microsoft-owned code storage and authorship platform. The threat group TeamPCP, formally tracked by Google Threat Intelligence Group as UNC6780, claimed responsibility and is advertising the stolen repositories for sale starting at $50,000. GitHub’s assessment: the attacker’s claim is “directionally consistent” with the investigation so far. Trend Micro, StepSecurity, and Snyk have formally tracked TeamPCP across at least seven waves of the Mini Shai-Hulud supply chain worm since March. The GitHub breach did not land in isolation. It arrived the same day a new Mini Shai-Hulud wave forged valid cryptographic provenance on 639 malicious npm package versions, one day after attackers compromised a VS Code extension with 2.2 million installs, the same day Wiz discovered TeamPCP had compromised Microsoft’s durabletask Python SDK on PyPI, and the same morning Verizon’s 2026 DBIR revealed that 67% of employees access AI tools through non-corporate accounts. Five supply chain surfaces failed in 48 hours. …