I'm a security researcher and for the past 45 days i've been researching on bitcoin protocol and how it is secured.
I found that each and every single bitcoin in the universe is in danger cuz i found a critical security flaw in bitcoin protocol that would give me infinity private keys and all that private keys work.
If you really are serious that you found a vulnerability then you had better follow the instructions at
https://bitcoincore.org/en/contact/ to securely email the developers. Do not open a Github issue or post a proof of concept publicly so that you don't reveal it to hackers.
But the general gist of this thread seems to be that you are bluffing so you should prove otherwise if you want to be taken seriously.
No, they never reply, I've already sent a mail coupe months ago for finding an xss ,still I did not get any reply from them and also it is not patched.