Azure API Management | Unintentional Pass through of Subscription Key Header
Problem Space There is a potential unintentional side effect when you add a APIM subscription key as a header to an inbound request. The header is not stripped from the request prior to being sent to the configured backend service. Rather it is retained.
If you manage the backing service and are not concerned with the disclosure of the subscription key, then no problem. However, being overly permissive of this information may make your API more vulnerable to security threats and disallows a separation of concerns.
Posted by Andrew Wilson on Tuesday, November 21, 2023