CORS Configuration

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Configuration

This plugin is compatible with DB-less mode.

Compatible protocols

The CORS plugin is compatible with the following protocols:

grpc, grpcs, http, https

Parameters

Here's a list of all the parameters which can be used in this plugin's configuration:

• name or plugin

  string required

  The name of the plugin, in this case cors.

  • If using the Kong Admin API, Konnect API, declarative configuration, or decK files, the field is name.
  • If using the KongPlugin object in Kubernetes, the field is plugin.

• instance_name

  string

  An optional custom name to identify an instance of the plugin, for example cors_my-service.

  The instance name shows up in Kong Manager and in Konnect, so it's useful when running the same plugin in multiple contexts, for example, on multiple services. You can also use it to access a specific plugin instance via the Kong Admin API.

  An instance name must be unique within the following context:

  • Within a workspace for Kong Gateway Enterprise
  • Within a control plane or control plane group for Konnect
  • Globally for Kong Gateway (OSS)

• service.name or service.id

  string

  The name or ID of the service the plugin targets. Set one of these parameters if adding the plugin to a service through the top-level /plugins endpoint. Not required if using /services/{serviceName|Id}/plugins.

• route.name or route.id

  string

  The name or ID of the route the plugin targets. Set one of these parameters if adding the plugin to a route through the top-level /plugins endpoint. Not required if using /routes/{routeName|Id}/plugins.

• enabled

  boolean default: true

  Whether this plugin will be applied.

• config

  record required
  • origins

    array of type string

    List of allowed domains for the Access-Control-Allow-Origin header. If you want to allow all origins, add * as a single value to this configuration field. The accepted values can either be flat strings or PCRE regexes.

  • headers

    array of type string

    Value for the Access-Control-Allow-Headers header.

  • exposed_headers

    array of type string

    Value for the Access-Control-Expose-Headers header. If not specified, no custom headers are exposed.

  • methods

    array of type string default: GET, HEAD, PUT, PATCH, POST, DELETE, OPTIONS, TRACE, CONNECT Must be one of: GET, HEAD, PUT, PATCH, POST, DELETE, OPTIONS, TRACE, CONNECT

    ‘Value for the Access-Control-Allow-Methods header. Available options include GET, HEAD, PUT, PATCH, POST, DELETE, OPTIONS, TRACE, CONNECT. By default, all options are allowed.’

  • max_age

    number

    Indicates how long the results of the preflight request can be cached, in seconds.

  • credentials

    boolean required default: false

    Flag to determine whether the Access-Control-Allow-Credentials header should be sent with true as the value.

  • preflight_continue

    boolean required default: false

    A boolean value that instructs the plugin to proxy the OPTIONS preflight request to the Upstream service.