core[patch]: update image util err msg (#27803)

libs/core/langchain_core/utils/image.py

@@ -3,6 +3,11 @@ from typing import Any
 
 def __getattr__(name: str) -> Any:
     if name in ("encode_image", "image_to_data_url"):
-        msg = f"'{name}' has been removed for security reasons."
+        msg = (
+            f"'{name}' has been removed for security reasons.\n\n"
+            f"Usage of this utility in environments with user-input paths is a "
+            f"security vulnerability. Out of an abundance of caution, the utility "
+            f"has been removed to prevent possible misuse."
+        )
         raise ValueError(msg)
     raise AttributeError(name)