// sensitive information to pass to the CSI driver to complete the CSI
  // ControllerExpandVolume call.
  // This field is optional, and may be empty if no secret is required. If the
  // secret object contains more than one secret, all secrets are passed.
  // +optional
  optional SecretReference controllerExpandSecretRef = 9;

  // nodeExpandSecretRef is a reference to the secret object containing

- Use of secret-based service account tokens now adds an `authentication.k8s.io/legacy-token-autogenerated-secret` or `authentication.k8s.io/legacy-token-manual-secret` audit annotation containing the name of the secret used. ([#118598](https://github.com/kubernetes/kubernetes/pull/118598), [@yuanchen8911](https://github.com/yuanchen8911)) [SIG Auth, Instrumentation...

### CVE-2023-2728: Bypassing enforce mountable secrets policy imposed by the ServiceAccount admission plugin

## Kubefed

* Deprecate the `--secret-name` flag from `kubefed join`, instead generating the secret name arbitrarily. ([#42513](https://github.com/kubernetes/kubernetes/pull/42513), [@perotinus](https://github.com/perotinus))


### **Kubernetes API**
#### User Provided Extensions

- kubeadm: Allowed to download certificate secrets uploaded by `init` or `upload-certs` phase, allowing to transfer certificate secrets (certificates and keys) from the cluster to other master machines when creating HA deployments. ([#74168](https://github.com/kubernetes/kubernetes/pull/74168), [@ereslibre](https://github.com/ereslibre))...

### Secrets
* Populate environment variables from a secrets. ([#39446](https://github.com/kubernetes/kubernetes/pull/39446), [@fraenkel](https://github.com/fraenkel))

* ACTION REQUIRED: Azure cloud provider could now be configured by Kubernetes secrets and a new option `cloudConfigType` is introduced, whose candidate values are `file`, `secret` and `merge` (default is `merge`). Note that the secret is a serialized version of azure.json file with key cloud-config. And the secret name is azure-cloud-provider in kube-system namespace. To allow Azure cloud provider read this secret, the RBAC permission referred [here](https://github.com/kubernetes/kubernetes/pull/78242)...

### Immutable Secrets and ConfigMaps

Immutable Secrets and ConfigMaps graduates to GA. This feature allows users to specify that the contents of a particular Secret or ConfigMap is immutable for its object lifetime. For such instances, Kubelet will not watch/poll for changes and therefore reducing apiserver load.

specified as environment variables. When we convert the OpenStack cloud provider to run in an external process, we can now use the kubernetes Secrets capability to inject the OS_* variables. This way we can specify the cloud configuration as a configmap, and specify secrets for the userid/password information. The configmap is mounted as a file, and the secrets are made available as environment variables. The external controller itself runs as a pod/daemonset. For backward compatibility, we preload...

* Azure file persistent volumes can use a new `secretNamespace` field to reference a secret in a different namespace than the one containing their bound persistent volume claim. The azure file persistent volume provisioner honors a corresponding `secretNamespace` storage class parameter to determine where to place secrets containing the storage account key. ([#47660](https://github.com/kubernetes/kubernetes/pull/47660), [@rootfs](https://github.com/rootfs))...