Policy
Make Access-Control-Allow-Methods matching in CORS preflight spec conformant
Microsoft Edge
Policy overview
Key metadata and intent for this policy.
Supported OS tags: Windows7
This policy controls whether request methods are uppercased when matching with Access-Control-Allow-Methods response headers in CORS preflight. If you disable this policy, request methods are uppercased. This is the behavior on or before Microsoft Edge 108. If you enable or don't configure this policy, request methods aren't uppercased, unless matching case-insensitively with DELETE, GET, HEAD, OPTIONS, POST, or PUT. This would reject fetch(url, {method: 'Foo'}) + "Access-Control-Allow-Methods: FOO" response header, and would accept fetch(url, {method: 'Foo'}) + "Access-Control-Allow-Methods: Foo" response header. Note: request methods "post" and "put" aren't affected, while "patch" is affected. This policy is intended to be temporary and will be removed in the future.
Registry values
How enabled and disabled states update the registry.
| Scope | Registry location | Type | Enabled value | Disabled value | Copy |
|---|---|---|---|---|---|
Path Software\Policies\Microsoft\Edge\WebView2 Value name AccessControlAllowMethodsInCORSPreflightSpecConformant | REG_DWORD | HKLM 1 HKCU 1 | HKLM 0 HKCU 0 |
Policy elements
Inputs and configuration options exposed by this policy.
This policy has no additional user input fields.