diff --git a/pyrit/exceptions/exceptions_helpers.py b/pyrit/exceptions/exceptions_helpers.py
index 73df4e2586..3662a7cdd7 100644
--- a/pyrit/exceptions/exceptions_helpers.py
+++ b/pyrit/exceptions/exceptions_helpers.py
@@ -115,10 +115,16 @@ def extract_json_from_string(response_msg: str) -> str:
         str: The extracted JSON string if found, otherwise the original string.
 
     """
-    json_pattern = re.compile(r"\{.*\}|\[.*\]")
-    match = json_pattern.search(response_msg)
-    if match:
-        return match.group(0)
+    decoder = json.JSONDecoder()
+    for index, char in enumerate(response_msg):
+        if char not in "[{":
+            continue
+
+        try:
+            _, end_index = decoder.raw_decode(response_msg, idx=index)
+            return response_msg[index:end_index]
+        except json.JSONDecodeError:
+            continue
 
     return response_msg
 
diff --git a/tests/unit/exceptions/test_exceptions_helpers.py b/tests/unit/exceptions/test_exceptions_helpers.py
index c8ddccb536..54435bd746 100644
--- a/tests/unit/exceptions/test_exceptions_helpers.py
+++ b/tests/unit/exceptions/test_exceptions_helpers.py
@@ -59,6 +59,10 @@ def test_remove_end_md_json(input_str, expected_output):
         ("No JSON here", "No JSON here"),
         ('jsn\n{"key": "value"}\n```', '{"key": "value"}'),
         ('Some text before JSON {"a": [1,2,3], "b": {"c": 4}} some text after JSON', '{"a": [1,2,3], "b": {"c": 4}}'),
+        (
+            'Some text before JSON {\n  "key": "value",\n  "nested": {"enabled": true}\n} some text after JSON',
+            '{\n  "key": "value",\n  "nested": {"enabled": true}\n}',
+        ),
     ],
 )
 def test_extract_json_from_string(input_str, expected_output):