🐝 Daily Buzz

Microsoft bans GitHub account after Chaotic Eclipse zero days

CybersecurityMay 27, 2026 at 12:45 PM

TLDR: REDMOND, Wash.Microsoft banned security researcher Chaotic Eclipse from GitHub and deleted a reporting account, which Eclipse calls vindictive after unpaid bounties.

Key Takeaways:

  • Background centers on MSRC’s reported bug bounty structure, with payouts up to $250,000 for Hyper V, and a longer dispute since BlueHammer in early April.
  • The GitHub ban forced Eclipse to move to GitLab, and Eclipse alleges Microsoft deleted the Microsoft account used for reporting Windows zero days.
  • Experts say the optics look vindictive without security benefit because exploit code is already out, setting up renewed disclosures and harsher researcher signals.
  • Nightmare Eclipse, known for Windows zero days like BlueHammer, RedSun, and UnDefend, says further releases are planned around July 14.
Buzzy

This is one of those fights where both sides think they are protecting security, yet the most visible outcome is harder to trust and easier to exploit. When channels close, researchers do not disappear, they just change platforms and timelines. 😬

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