Hi @xmontero, we’re currently working on bringing CORS support to the webhooks node. You can follow the progress here:
In the meantime you would unfortunately have to configure this outside of n8n (for example in your reverse proxy).
For custom HTTP methods on the webhook node, perhaps you want to open a new feature request on the forum so other users can leave a vote on this?
Perhaps you also want to vote on the corresponding feature request for the HTTP Request node? You can find it here: Custom method in the HTTP Reques node