diff --git a/CHANGES b/CHANGES
index b04362e13..3e155f33a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -33,6 +33,7 @@ Bugs fixed
 * #8190: autodoc: parsing error is raised if some extension replaces docstring
   by string not ending with blank lines
 * #8192: napoleon: description is disappeared when it contains inline literals
+* #8172: napoleon: Potential of regex denial of service in google style docs
 * #8169: LaTeX: pxjahyper loaded even when latex_engine is not platex
 * #8093: The highlight warning has wrong location in some builders (LaTeX,
   singlehtml and so on)
diff --git a/sphinx/ext/napoleon/docstring.py b/sphinx/ext/napoleon/docstring.py
index 97eaa0fd6..d36fdd17a 100644
--- a/sphinx/ext/napoleon/docstring.py
+++ b/sphinx/ext/napoleon/docstring.py
@@ -31,7 +31,7 @@ logger = logging.getLogger(__name__)
 
 _directive_regex = re.compile(r'\.\. \S+::')
 _google_section_regex = re.compile(r'^(\s|\w)+:\s*$')
-_google_typed_arg_regex = re.compile(r'\s*(.+?)\s*\(\s*(.*[^\s]+)\s*\)')
+_google_typed_arg_regex = re.compile(r'(.+?)\(\s*(.*[^\s]+)\s*\)')
 _numpy_section_regex = re.compile(r'^[=\-`:\'"~^_*+#<>]{2,}\s*$')
 _single_colon_regex = re.compile(r'(?<!:):(?!:)')
 _xref_or_code_regex = re.compile(
@@ -254,7 +254,7 @@ class GoogleDocstring:
         if parse_type:
             match = _google_typed_arg_regex.match(before)
             if match:
-                _name = match.group(1)
+                _name = match.group(1).strip()
                 _type = match.group(2)
 
         _name = self._escape_args_and_kwargs(_name)