It's even hard to imagine how this might have happened. Is the service a shared Jupyter server (or group thereof) that somehow has access to everything and it's

It's even hard to imagine how this might have happened. Is the service a shared Jupyter server (or group thereof) that somehow has access to everything and it's within this service that the access/authorization is implemented? I wouldn't expect IAM to work this way in a cloud service I don't know how these security boundaries are usually implemented, but I would expect this bug to be way less plausible. Isn't this an architectural smell?