Add Vary: Access-Control-Request-Method/Headers CORS headers [SPR-16413] · Issue #20959 · spring-projects/spring-framework · GitHub
![Multiple CORS header 'Access-Control-Allow-Origin' not allowed if service having a CORS middleware · Issue #18 · krakendio/krakend-cors · GitHub Multiple CORS header 'Access-Control-Allow-Origin' not allowed if service having a CORS middleware · Issue #18 · krakendio/krakend-cors · GitHub](https://user-images.githubusercontent.com/29707928/137885853-aef2701f-823e-4da3-8673-577fec320716.png)
Multiple CORS header 'Access-Control-Allow-Origin' not allowed if service having a CORS middleware · Issue #18 · krakendio/krakend-cors · GitHub
![Response to preflight request doesn't pass access control check: No 'Access- Control-Allow-Origin' - Kibana - Discuss the Elastic Stack Response to preflight request doesn't pass access control check: No 'Access- Control-Allow-Origin' - Kibana - Discuss the Elastic Stack](https://global.discourse-cdn.com/elastic/original/3X/2/3/23e41b23ae2a65312992c5135318796b2524abac.png)