diff --git a/guides/source/active_storage_overview.md b/guides/source/active_storage_overview.md
index ae5e5049720c71c26babb759de8b4496a70520a4..fb11cd51ba178f588167e052e38f84559ec3235a 100644
--- a/guides/source/active_storage_overview.md
+++ b/guides/source/active_storage_overview.md
@@ -520,6 +520,8 @@ Take care to allow:
   * `x-ms-blob-content-disposition` (for Azure Storage only)
   * `x-ms-blob-type` (for Azure Storage only)
 
+No CORS configuration is required for the Disk service since it shares your app’s origin.
+
 #### Example: S3 CORS configuration
 
 ```xml