# istio_43986.yaml
apiVersion: release-notes/v2
kind: feature
area: security
issue:
  - 43986
releaseNotes:
- |
  **Added** experimental support for the v1alpha1 `ClusterTrustBundle` API. This can be enabled by setting `values.pilot.env.ENABLE_CLUSTER_TRUST_BUNDLE_API=true`. Note that you will have to make sure to also enable the respective feature gates in your cluster, see [KEP-3257](https://github.com/kubernetes/enhancements/tree/master/keps/sig-auth/3257-cluster-trust-bundles) for details.