Security concern - looking for private disclosure channel

[KatanaQuant]

I identified a security issue.

I'd like to share details, POC, and CVSS scoring privately.

I sent an email to garry@ycombinator.com on April 3 and reached out via mutual contacts on April 5 but haven't heard back.

What's the best way to get this to the right person?

[KatanaQuant]

just sent a followup with more, up to date info