- Default RBAC policy no longer grants access to discovery and permission-checking APIs (used by `kubectl auth can-i`) to *unauthenticated* users. Upgraded clusters preserve prior behavior, but cluster administrators wishing to grant unauthenticated users access in new clusters will need to explicitly opt-in to expose the discovery and/or permission-checking APIs: ([#73807](https://github.com/kubernetes/kubernetes/pull/73807), [@dekkagaijin](https://github.com/dekkagaijin))