It seems the Y Combinator bot secrets were compromised. They acted fast, as the issue is no longer available.
<img src="https://media.daily.dev/image/upload/s--gAXj1tEp--/f_auto/v1758664292/ugc/content_e7ccabf6-5307-451a-acb4-db211ab5dc28?_a=BAMAK+ZW0" alt="image">
Issue: <a href="https://github.com/y-combinatororg/ycombinatororg/issues/166" target="_blank" rel="noopener nofollow">https://github.com/y-combinatororg/ycombinatororg/issues/166</a>

Dickson A.

Y Combinator experienced a security incident where bot secrets were compromised and exposed. The organization responded quickly to address the vulnerability, and the related GitHub issue has since been removed.

Y Combinator Bot Secrets Leak