No that's not what they did, they exposed jfrog raw. It would have been so extremely simple to gate services they need the llm to access... I mean, jfrog was not written with this kind of threat model in mind, and neither were a lot of other tools
Whilst it might not be JFrog's threat model, I wouldn't assume it can be used as a full internet proxy.
I don't really mean to defend OpenAI here, but they did make some attempts at sandboxing. Although it does seem that they didn't really know what they were doing.
And we don't just magically know all the consequences of that.
Which is exactly why we do need full, physical air gapping. (Which, yes, would also include self-hosting a mirror of the package repo, if the point of the simulation is to see what's possible with the real package repo.)