Isn't this a show of security negligence rather than of exceptional agent capabilities? Don't get me wrong, I am pretty impressed that an agent was able to use these vulnerabilities. But I am way more impressed by the vulnerabilities...
I've actually observed similar behavior at home.
I have a k3s cluster running at home. I asked an agent to check some stuff as a normal user but I had kubectl access to the k3s cluster.
Part of the research, I'd allowed access to run kubectl commands for spinning up test containers. However, when the agent ran into something that needed sudo, it realized it didn't have access there so it immediately used k3s and mounted a localpath into an ephemeral pod to gain access. Sort of horrifying how fast and natural it was for the agent just checking my network (it found the problem fyi).
None of this is very exceptional other than the fact that an agent doesn't have any sort of qualms using any route available to elevate permissions.