https://developer.mozilla.org › en-US › docs › Web › HTTP › CORS

The CORS mechanism supports secure cross-origin requests and data transfers between browsers and servers. Browsers use CORS in APIs such as fetch() or XMLHttpRequest to mitigate the risks of cross-origin HTTP requests.

https://stackoverflow.com › questions › 19743396

Possible values: Boolean - set origin to true to reflect the request origin, as defined by req.header('Origin'), or set it to false to disable CORS. Hence we simply do the following: const app = express(); const corsConfig = { credentials: true, origin: true, }; app.use(cors(corsConfig));

https://developer.mozilla.org › en-US › docs › Web › HTML › Attributes › crossorigin

The crossorigin content attribute on media elements is a CORS settings attribute. These attributes are enumerated, and have the following possible values: anonymous. Request uses CORS headers and credentials flag is set to 'same-origin'.

http://devdoc.net › web › developer.mozilla.org › en-US › docs › HTTP_access_control.html

The Cross-Origin Resource Sharing (CORS) mechanism gives web servers cross-domain access controls, which enable secure cross-domain data transfers. Modern browsers use CORS in an API container - such as XMLHttpRequest or Fetch - to mitigate risks of cross-origin HTTP requests.

https://portswigger.net › web-security › cors

A controlled relaxation of the same-origin policy is possible using cross-origin resource sharing (CORS). The cross-origin resource sharing protocol uses a suite of HTTP headers that define trusted web origins and associated properties such as whether authenticated access is permitted.

https://www.w3.org › TR › 2020 › SPSD-cors-20200602

A cross-origin request with credentials as defined in this specification is used to substitute for alternate methods of authenticated resource sharing, such as server-to-server back channels, JSONP, or cross-document messaging.

https://learn.microsoft.com › en-us › aspnet › core › security › cors

Credentials in cross-origin requests. Credentials require special handling in a CORS request. By default, the browser doesn't send credentials with a cross-origin request. Credentials include cookies and HTTP authentication schemes. To send credentials with a cross-origin request, the client must set XMLHttpRequest.withCredentials to true.

https://developer.mozilla.org › en-US › docs › Web › HTTP › Headers › Access-Control-Allow-Credentials

The Access-Control-Allow-Credentials response header tells browsers whether the server allows cross-origin HTTP requests to include credentials. Credentials are cookies, TLS client certificates, or authentication headers containing a username and password.

https://www.baeldung.com › cs › cors-preflight-requests

By default, the CORS policy doesn’t allow including credentials in a cross-origin request unless both the request includes a flag to include credentials and the server responds with the access-control-allow-credentials set to true.