Honestly, it's pretty disappointing to see responsible disclosure fail like this. It takes a lot of effort to release a critical patch.
Leaking the announcement or publishing a PoC before a scheduled patch shows you have no ethics and are only interested in credit for yourself.
@valorin Did someone actually do a real PoC? The session upload one is fake from what I can tell; if I throw GLM Flash and DSV4.1F at it and they can't repro then that PoC isn't for the CVSS 10-ish.