Are you 100% sure? I have tested 2 PoC's against my dev environment, no luck so far. So I am not sure if there is working exploit already.

I ran the PoC on my dev environment, the PoC is not complete and does not work.

It is not a complete proven PoC, have you read the REPORT_VALIDATION.md, especially section 7.

I have tried the so-called-POC of the URL you linked, it seems it is not a full POC. I have tested it against my local PHP instances; it does not work.

I can still select Fable, I have a pro subscription.

But can you use it?

I was selected into fable, my context window had restructured my database schema and was about to deploy and migrate the existing database, then "you need to purchase credits to use this model" appeared right in the middle of the session.