Microsoft's actions against Nightmare Eclipse undermine the principles of responsible disclosure in cybersecurity.

Cybersecurity Corporate AccountabilityMay 24, 2026score 0.602 posts · 0 replies across 2 instances

Microsoft has banned a security researcher named Nightmare Eclipse from GitHub, following the deletion of their MSRC account. The researcher had previously disclosed several zero-day vulnerabilities. They have since moved their work to a blogspot site. This incident has raised concerns about responsible disclosure practices.

Claims

Parent: CybersecurityEntity: Responsible DisclosureImpact: negativeDate: May 24, 2026 - May 25, 2026Target: Microsoft's actions against Nightmare Eclipse

Source posts

@[email protected]

Microsoft has banned Nightmare Eclipse from GitHub: https://github.com/Nightmare-Eclipse/

This is the researcher who disclosed several zero-days after Microsoft also deleted their MSRC account

They now moved on GitLab: https://deadeclipse666.blogspot.com/

30 boosts · 20 favs · 0 replies · May 24, 2026

@[email protected]

Microsoft has banned security researcher "Nightmare Eclipse" from GitHub!

This is the researcher who disclosed several zero-days after Microsoft also deleted their MSRC account. This security researcher is now on blogspot: https://deadeclipse666.blogspot.com/ 

Not a good day for "Responsible Disclosure".

5 boosts · 0 favs · 0 replies · May 25, 2026