diff --git a/go/enum/parser.go b/go/enum/parser.go
index 617d22b3..e5dea683 100644
--- a/go/enum/parser.go
+++ b/go/enum/parser.go
@@ -17,6 +17,9 @@ func GetStringValue[E protoreflect.Enum](e E) (*string, error) {
 			return nil, fmt.Errorf("given enum is a nil pointer")
 		}
 	}
+	if e.Descriptor().Values().Len() <= int(e.Number()) {
+		return nil, fmt.Errorf("given enum number:%d is out of range", e.Number())
+	}
 	value := e.Descriptor().Values().Get(int(e.Number()))
 
 	// Retrieve custom options
diff --git a/go/enum/parser_test.go b/go/enum/parser_test.go
index 4789a9f5..c25ae94e 100644
--- a/go/enum/parser_test.go
+++ b/go/enum/parser_test.go
@@ -50,4 +50,10 @@ func TestGetStringValue(t *testing.T) {
 	require.NoError(t, err)
 	require.NotNil(t, got)
 	require.Equal(t, "ext3", *got)
+
+	var invalid apiv2.Format = 42
+	got, err = GetStringValue(invalid)
+	require.Error(t, err)
+	require.EqualError(t, err, "given enum number:42 is out of range")
+	require.Nil(t, got)
 }