diff --git a/src/Umbraco.Web.BackOffice/Controllers/MediaController.cs b/src/Umbraco.Web.BackOffice/Controllers/MediaController.cs
index db47ba599f6e..f8e28989b123 100644
--- a/src/Umbraco.Web.BackOffice/Controllers/MediaController.cs
+++ b/src/Umbraco.Web.BackOffice/Controllers/MediaController.cs
@@ -788,8 +788,7 @@ public async Task<IActionResult> PostAddFile([FromForm] string path, [FromForm]
                     continue;
                 }
 
-                using var stream = new MemoryStream();
-                await formFile.CopyToAsync(stream);
+                await using var stream = formFile.OpenReadStream();
                 if (_fileStreamSecurityValidator != null && _fileStreamSecurityValidator.IsConsideredSafe(stream) == false)
                 {
                     tempFiles.Notifications.Add(new BackOfficeNotification(