diff --git a/sklearn/utils/validation.py b/sklearn/utils/validation.py
index 5936415c776b8..1983a9c4d19ff 100644
--- a/sklearn/utils/validation.py
+++ b/sklearn/utils/validation.py
@@ -1418,6 +1418,15 @@ def check_scalar(
             f"Possible values are: {expected_include_boundaries}."
         )
 
+    if include_boundaries in ("left", "both") and min_val is None:
+        raise ValueError(
+            f"Invalid combination of `{include_boundaries}` and `{min_val}`"
+        )
+    if include_boundaries in ("right", "both") and max_val is None:
+        raise ValueError(
+            f"Invalid combination of `{include_boundaries}` and `{max_val}`"
+        )
+
     comparison_operator = (
         operator.lt if include_boundaries in ("left", "both") else operator.le
     )