properties:
                        allowCredentials:
                          description: Indicates whether the caller is allowed to
                            send the actual request (not the preflight) using credentials.
                          nullable: true
                          type: boolean
                        allowHeaders:
                          description: List of HTTP headers that can be used when

                      properties:
                        allowCredentials:
                          description: Indicates whether the caller is allowed to
                            send the actual request (not the preflight) using credentials.
                          nullable: true
                          type: boolean
                        allowHeaders:
                          description: List of HTTP headers that can be used when

* kubeadm now produces error during preflight checks if swap is enabled. Users, who can setup kubelet to run in unsupported environment with enabled swap, will be able to skip that preflight check. ([#55399](https://github.com/kubernetes/kubernetes/pull/55399), [@kad](https://github.com/kad))

- Kubeadm: the `bridge-nf-call-iptables=1` and `bridge-nf-call-ip6tables=1` preflight checks are removed since not all the network implementations require this setting, network plugins are responsible for setting this correctly depending on whether or not they connect containers to Linux bridges or use some other mechanism. ([#12...

list of route rules for HTTP traffic. items: properties: corsPolicy: description: Cross-Origin Resource Sharing policy (CORS). properties: allowCredentials: description: Indicates whether the caller is allowed to send the actual request (not the preflight) using credentials. nullable: true type: boolean allowHeaders: description: List of HTTP headers that can be used when requesting the resource. items: type: string type: array allowMethods: description: List of HTTP methods allowed to access the...

- `kubeadm`: turned on feature gate `MergeCLIArgumentsWithConfig` to merge the config from flag and config file, otherwise, if the flag `--ignore-preflight-errors` is set from the CLI, then the value from config file will be ignored. ([#119946](https://github.com/kubernetes/kubernetes/pull/119946), [@chendave](https://github.com/chendave))

- Added support for RSA and ECDSA format keys in preflight check on `kubeadm`. ([#112508](https://github.com/kubernetes/kubernetes/pull/112508), [@SataQiu](https://github.com/SataQiu))

with a content type of `text/plain` containing JSON data would be accepted and the JSON data would be extracted.

But requests with content type `text/plain` are exempt from [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) preflights, for being considered [Simple requests](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests). So, the browser would execute them right away including cookies, and the text content could be a JSON string that would be parsed and...