diff --git a/apps/assets/serializers/asset/common.py b/apps/assets/serializers/asset/common.py
index 59799ba70..75d8c4c19 100644
--- a/apps/assets/serializers/asset/common.py
+++ b/apps/assets/serializers/asset/common.py
@@ -304,6 +304,10 @@ class AssetSerializer(BulkOrgResourceModelSerializer, WritableNestedModelSeriali
         from accounts.models import AccountTemplate
         if not accounts_data:
             return
+
+        if not isinstance(accounts_data[0], dict):
+            raise serializers.ValidationError({'accounts': _("Invalid data")})
+
         su_from_name_username_secret_type_map = {}
         for data in accounts_data:
             data['asset'] = asset.id