diff --git a/dojo/tools/sarif/parser.py b/dojo/tools/sarif/parser.py
index d554e1d51e3..cd7107d5352 100644
--- a/dojo/tools/sarif/parser.py
+++ b/dojo/tools/sarif/parser.py
@@ -385,8 +385,9 @@ def customize_finding(self, finding, result, rule, location):
 def get_rules(run):
     rules = {}
     rules_array = run["tool"]["driver"].get("rules", [])
-    if len(rules_array) == 0 and run["tool"].get("extensions") is not None:
-        rules_array = run["tool"]["extensions"][0].get("rules", [])
+    if not rules_array:
+        for extension in run["tool"].get("extensions", []):
+            rules_array.extend(extension.get("rules", []))
     for item in rules_array:
         rules[item["id"]] = item
     return rules