# istio_no_extension_lookup_by_name.yaml
apiVersion: release-notes/v2
kind: bug-fix
area: traffic-management
releaseNotes:
  - |
    **Removed** support for looking up Envoy extensions in `EnvoyFilter` configuration by name without the typed config URL.

upgradeNotes:
  - title: EnvoyFilter must specify the type URL for an Envoy extension injection.
    content: |
      Previously, Istio permitted a lookup of the extension in `EnvoyFilter` by its internal Envoy name alone. To see if you are affected,
      run `istioctl analyze` and check for a deprecation warning `using deprecated types by name without typed_config`. Additionally, make
      sure any nested extension lists inside `EnvoyFilter` include both `name:` and `typed_config:` fields.