diff --git a/core/Controller/CollaborationResourcesController.php b/core/Controller/CollaborationResourcesController.php
index 77f47a9f0a11ba3de4257ec83a8e59e9a9d6f4a9..4278334c2b9917ce15218f03a15540e7903172ae 100644
--- a/core/Controller/CollaborationResourcesController.php
+++ b/core/Controller/CollaborationResourcesController.php
@@ -225,6 +225,10 @@ class CollaborationResourcesController extends OCSController {
 	}
 
 	protected function prepareCollection(ICollection $collection): array {
+		if (!$collection->canAccess($this->userSession->getUser())) {
+			return null;
+		}
+
 		return [
 			'id' => $collection->getId(),
 			'name' => $collection->getName(),