diff --git a/tests/entrypoints/serve/exception_handling/test_error_sanitization.py b/tests/entrypoints/serve/exception_handling/test_error_sanitization.py
index 426d1ede74..98bf808965 100644
--- a/tests/entrypoints/serve/exception_handling/test_error_sanitization.py
+++ b/tests/entrypoints/serve/exception_handling/test_error_sanitization.py
@@ -18,6 +18,10 @@ def test_sanitize_message():
         sanitize_message("<_io.BytesIO object at 0x7a95e299e750>")
         == "<_io.BytesIO object>"
     )
+    assert (
+        sanitize_message("<PIL.Image.Image image mode=RGB size=2x2 at 0x7D52EAF07BF0>")
+        == "<PIL.Image.Image image mode=RGB size=2x2>"
+    )
 
 
 class TestSanitizeMessageFilePaths:
diff --git a/vllm/entrypoints/serve/exception_handling/utils.py b/vllm/entrypoints/serve/exception_handling/utils.py
index 73d9992237..6c1dd20516 100644
--- a/vllm/entrypoints/serve/exception_handling/utils.py
+++ b/vllm/entrypoints/serve/exception_handling/utils.py
@@ -6,7 +6,7 @@ import regex as re
 
 def sanitize_message(message: str) -> str:
     """Strip memory addresses, tracebacks, and file paths from error messages."""
-    message = re.sub(r" at 0x[0-9a-f]+>", ">", message)
+    message = re.sub(r" at 0x[0-9a-fA-F]+>", ">", message)
     message = re.sub(r'\n?\s*File "[^"]+", line \d+, in \S+(\n\s+.*)?', "", message)
     message = re.sub(
         r"/(?:home|usr|opt|var|tmp|root|lib|mnt|srv)(?:/[\w.\-]+)+", "<path>", message