![403 response to a CORS preflight request from an angular app to a spring security REST API caused by a Access-Control-Request-Headers mismatch | Coding Notes 403 response to a CORS preflight request from an angular app to a spring security REST API caused by a Access-Control-Request-Headers mismatch | Coding Notes](https://nicolas.riousset.com/wp-content/uploads/2021/03/2021-03-18_23h24_19.png)
403 response to a CORS preflight request from an angular app to a spring security REST API caused by a Access-Control-Request-Headers mismatch | Coding Notes
3 Ways to Fix the CORS Error — and How the Access-Control-Allow-Origin Header Works | by David Katz | Medium
![angular - The 'Access-Control-Allow-Origin' header has a value 'http:// localhost:4200' that is not equal to the supplied origin - Stack Overflow angular - The 'Access-Control-Allow-Origin' header has a value 'http:// localhost:4200' that is not equal to the supplied origin - Stack Overflow](https://i.stack.imgur.com/ktQPS.png)
angular - The 'Access-Control-Allow-Origin' header has a value 'http:// localhost:4200' that is not equal to the supplied origin - Stack Overflow
![angularjs - how to resolve No 'Access-Control-Allow-Origin' header is present on the requested resource - Stack Overflow angularjs - how to resolve No 'Access-Control-Allow-Origin' header is present on the requested resource - Stack Overflow](https://i.stack.imgur.com/Cbg0r.png)
angularjs - how to resolve No 'Access-Control-Allow-Origin' header is present on the requested resource - Stack Overflow
![No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin - ionic-v3 - Ionic Forum No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin - ionic-v3 - Ionic Forum](https://global.discourse-cdn.com/ionicframework/optimized/3X/e/7/e76f7692a70a8cf3e78946ca178391d58298dcb3_2_1024x605.png)
No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin - ionic-v3 - Ionic Forum
![https - CORS: No 'Access-Control-Allow-Origin' header is present even though response is 200? - Stack Overflow https - CORS: No 'Access-Control-Allow-Origin' header is present even though response is 200? - Stack Overflow](https://i.stack.imgur.com/JT0k1.png)
https - CORS: No 'Access-Control-Allow-Origin' header is present even though response is 200? - Stack Overflow
![How to fix Access-Control-Allow-Origin (CORS origin) Issue for your HTTPS enabled WordPress Site and MaxCDN • Crunchify How to fix Access-Control-Allow-Origin (CORS origin) Issue for your HTTPS enabled WordPress Site and MaxCDN • Crunchify](https://crunchify.com/wp-content/uploads/2016/04/How-to-fix-Access-Control-Allow-Origin-issue-for-your-HTTPS-enabled-WordPress-site.png)
How to fix Access-Control-Allow-Origin (CORS origin) Issue for your HTTPS enabled WordPress Site and MaxCDN • Crunchify
![Access to XMLHttpRequest at ' ... ' from origin ' ... ' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present Access to XMLHttpRequest at ' ... ' from origin ' ... ' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present](https://user-images.githubusercontent.com/59934065/82938648-c451a680-9faf-11ea-8349-991e68798f72.png)
Access to XMLHttpRequest at ' ... ' from origin ' ... ' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present
![The 'Access-Control-Allow-Origin' header contains multiple values 'http:// localhost:8100, *', but only one is allowed - ionic-v3 - Ionic Forum The 'Access-Control-Allow-Origin' header contains multiple values 'http:// localhost:8100, *', but only one is allowed - ionic-v3 - Ionic Forum](https://global.discourse-cdn.com/ionicframework/original/3X/6/b/6b042f46257ffdb5a133dda11287e1d43c4c8900.png)
The 'Access-Control-Allow-Origin' header contains multiple values 'http:// localhost:8100, *', but only one is allowed - ionic-v3 - Ionic Forum
![Access to fetch at <Fetching API URL> from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource - Developing with Prismic - Prismic People Access to fetch at <Fetching API URL> from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource - Developing with Prismic - Prismic People](https://europe1.discourse-cdn.com/business20/uploads/prismic/original/2X/f/fb5879f57835f90f127115ab003736c7a72d97cc.png)