diff --git a/Cargo.lock b/Cargo.lock
index 6177ebe8..a69f98da 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4322,7 +4322,7 @@ dependencies = [
 
 [[package]]
 name = "oxicloud"
-version = "0.8.2"
+version = "0.8.7"
 dependencies = [
  "accept-language",
  "aes-gcm",
diff --git a/src/application/services/mount_dto.rs b/src/application/services/mount_dto.rs
index f2227f5e..ef1ca1b0 100644
--- a/src/application/services/mount_dto.rs
+++ b/src/application/services/mount_dto.rs
@@ -67,6 +67,11 @@ pub fn mount_folder_dto(cfg: &MountConfig, parent_id: &str, stat: &MountStat) ->
         category: Arc::from("Folder"),
         created_by: Some(cfg.owner_id),
         updated_by: Some(cfg.owner_id),
+        // Mount entries carry synthetic `ext:*` ids that don't exist in
+        // `auth.user_favorites` or `storage.role_grants`, so both flags
+        // are always false — they can't be favorited or grant-listed.
+        is_favorite: false,
+        is_shared: false,
     }
 }
 
@@ -88,6 +93,8 @@ pub fn mount_entry_folder_dto(cfg: &MountConfig, parent_id: &str, entry: &MountE
         category: Arc::from("Folder"),
         created_by: Some(cfg.owner_id),
         updated_by: Some(cfg.owner_id),
+        is_favorite: false,
+        is_shared: false,
     }
 }
 
@@ -115,6 +122,8 @@ pub fn mount_entry_file_dto(cfg: &MountConfig, parent_id: &str, entry: &MountEnt
         etag: virtual_file_etag(entry.size, entry.modified_at),
         created_by: Some(cfg.owner_id),
         updated_by: Some(cfg.owner_id),
+        is_favorite: false,
+        is_shared: false,
     }
 }
 
@@ -141,5 +150,7 @@ pub fn mount_file_dto(cfg: &MountConfig, parent_id: &str, stat: &MountStat) -> F
         etag: virtual_file_etag(stat.size, stat.modified_at),
         created_by: Some(cfg.owner_id),
         updated_by: Some(cfg.owner_id),
+        is_favorite: false,
+        is_shared: false,
     }
 }
diff --git a/src/interfaces/api/handlers/folder_handler.rs b/src/interfaces/api/handlers/folder_handler.rs
index 9b0a61f3..eb87b14d 100644
--- a/src/interfaces/api/handlers/folder_handler.rs
+++ b/src/interfaces/api/handlers/folder_handler.rs
@@ -686,6 +686,10 @@ fn mount_entry_to_item(
             category: Arc::from("Folder"),
             created_by: Some(cfg.owner_id),
             updated_by: Some(cfg.owner_id),
+            // Mount entries use synthetic `ext:*` ids — no favorites /
+            // grants rows can ever key against them.
+            is_favorite: false,
+            is_shared: false,
         };
         FolderResourceItemDto {
             resource_type: ResourceTypeDto::Folder,
@@ -713,6 +717,8 @@ fn mount_entry_to_item(
             etag: virtual_file_etag(entry.size, entry.modified_at),
             created_by: Some(cfg.owner_id),
             updated_by: Some(cfg.owner_id),
+            is_favorite: false,
+            is_shared: false,
         };
         FolderResourceItemDto {
             resource_type: ResourceTypeDto::File,