diff --git a/CHANGES b/CHANGES
index c0e68887a..b000154f8 100644
--- a/CHANGES
+++ b/CHANGES
@@ -17,6 +17,7 @@ Bugs fixed
 ----------
 
 * #7120: html: crashed when on scaling SVG images which have float dimentions
+* #7126: autodoc: TypeError: 'getset_descriptor' object is not iterable
 
 Testing
 --------
diff --git a/sphinx/ext/autodoc/importer.py b/sphinx/ext/autodoc/importer.py
index 672d90ec7..c0381d7b4 100644
--- a/sphinx/ext/autodoc/importer.py
+++ b/sphinx/ext/autodoc/importer.py
@@ -12,7 +12,7 @@ import importlib
 import traceback
 import warnings
 from collections import namedtuple
-from typing import Any, Callable, Dict, List, Tuple
+from typing import Any, Callable, Dict, List, Mapping, Tuple
 
 from sphinx.deprecation import RemovedInSphinx40Warning, deprecated_alias
 from sphinx.util import logging
@@ -164,7 +164,7 @@ def get_object_members(subject: Any, objpath: List[str], attrgetter: Callable,
             continue
 
     # annotation only member (ex. attr: int)
-    if hasattr(subject, '__annotations__'):
+    if hasattr(subject, '__annotations__') and isinstance(subject.__annotations__, Mapping):
         for name in subject.__annotations__:
             if name not in members:
                 members[name] = Attribute(name, True, INSTANCEATTR)