fix: treat an existing file path as literal instead of a glob pattern

src/cfnlint/config.py

@@ -1052,7 +1052,10 @@ def _glob_filenames(
         all_filenames = []
 
         for filename in filenames:
-            add_filenames = glob.glob(filename, recursive=True)
+            if Path(filename).is_file():
+                add_filenames = [filename]
+            else:
+                add_filenames = glob.glob(filename, recursive=True)
 
             if not add_filenames and not self.ignore_bad_template:
                 if raise_exception:

test/unit/module/config/test_config_mixin.py

@@ -5,6 +5,7 @@
 
 import logging
 import os
+import tempfile
 from pathlib import Path
 from test.testlib.testcase import BaseTestCase
 from unittest.mock import patch
@@ -199,6 +200,18 @@ def test_config_expand_paths(self, isatty_mock, yaml_mock):
             ],
         )
 
+    @patch("cfnlint.config.ConfigFileArgs._read_config", create=True)
+    def test_config_literal_path_with_glob_characters(self, yaml_mock):
+        """Test literal paths containing glob metacharacters."""
+        yaml_mock.side_effect = [{}, {}]
+        with tempfile.TemporaryDirectory() as temp_dir:
+            filename = Path(temp_dir) / "template[1].yaml"
+            filename.touch()
+
+            config = cfnlint.config.ConfigMixIn(templates=[str(filename)])
+
+            self.assertEqual(config.templates, [str(filename)])
+
     @patch("cfnlint.config.ConfigFileArgs._read_config", create=True)
     @patch("sys.stdin.isatty", return_va=True)
     def test_config_expand_paths_nomatch(self, isatty_mock, yaml_mock):