* The `rbac.authorization.k8s.io/v1beta1` API has been promoted to `rbac.authorization.k8s.io/v1` with no changes. ([#49642](https://github.com/kubernetes/kubernetes/pull/49642), [@liggitt](https://github.com/liggitt))
    * The `rbac.authorization.k8s.io/v1alpha1` version is deprecated and will be removed in a future release.

- `kube-apiserver` added two new metrics `authorization_attempts_total` and `authorization_duration_seconds`
  that allow users to monitor requests to authorization webhooks, split by result. ([#117211](https://github.com/kubernetes/kubernetes/pull/117211), [@HirazawaUi](https://github.com/HirazawaUi))

- The following features...

  - The `Node` authorization mode no longer allows kubelets to delete their Node API objects (prior to 1.11, in rare circumstances related to cloudprovider node ID changes, kubelets would attempt to delete/recreate their Node object at startup) ([#71021](https://github.co...

### Auth

- The default delegating authorization options now allow unauthenticated access to healthz, readyz, and livez.  A system:masters user connecting to an authz delegator will not perform an authz check. ([#98325](https://github.com/kubernetes/kubernetes/pull/98325), [@deads2k](https:/...

- Added authorization check support to the CEL expressions of ValidatingAdmissionPolicy via a `authorizer`

* The boostrapped RBAC role and rolebinding for the `cloud-provider` service account is now deprecated. If you're currently using this service account, you must create and apply your own [RBAC policy](https://kubernetes.io/docs/admin/authorization/rbac/) for new clusters. ([#59949](https://github.com/kubernetes/kubernetes/pull/59949), [@nicksardo](https://github.com/nicksardo))

- kube-apiserver now reported the following metrics for authorization webhook match conditions: - `apiserver_authorization_match_condition_evaluation_errors_total` counter metric labeled by authorizer type and name - `apiserver_authorization_match_condition_exclusions_total` counter metric labeled by authorizer type and name - `apiserver_authorization_match_condition_evaluation_seconds` histogram metric labeled by authorizer type and name.

#### Node Authorization