diff --git a/python/PyQt/CMakeLists.txt b/python/PyQt/CMakeLists.txt
index 2be5ac1e6b7..54562269bce 100644
--- a/python/PyQt/CMakeLists.txt
+++ b/python/PyQt/CMakeLists.txt
@@ -2,6 +2,7 @@ set (QGIS_PYQT_DIR ${Python_SITEARCH}/qgis/PyQt)
 
 set(PYQT_COMPAT_FILES
   __init__.py
+  common.py
   QtWidgets.py
   QtCore.py
   QtGui.py
diff --git a/python/PyQt/PyQt/QtNetwork.py.in b/python/PyQt/PyQt/QtNetwork.py.in
index 244d615ba1a..e88d2cc7b02 100644
--- a/python/PyQt/PyQt/QtNetwork.py.in
+++ b/python/PyQt/PyQt/QtNetwork.py.in
@@ -22,6 +22,7 @@ __date__ = 'March 2016'
 __copyright__ = '(C) 2016, Juergen E. Fischer'
 
 from PyQt@QT_VERSION_MAJOR@.QtNetwork import *
+from .common import install_extended_enum_wrapper
 
 if @QT_VERSION_MAJOR@ == 6:
     # patch back in Qt flags removed in PyQt
@@ -33,3 +34,6 @@ if @QT_VERSION_MAJOR@ == 6:
     QNetworkInterface.InterfaceFlags = lambda flags=0: QNetworkInterface.InterfaceFlag(flags)
     QNetworkProxy.Capabilities = lambda flags=0: QNetworkProxy.Capability(flags)
     QSsl.SslOptions = lambda flags=0: QSsl.SslOption(flags)
+
+    QNetworkRequest.setAttribute = install_extended_enum_wrapper(QNetworkRequest.setAttribute)
+
diff --git a/python/PyQt/PyQt/common.py.in b/python/PyQt/PyQt/common.py.in
new file mode 100644
index 00000000000..8616c284a8a
--- /dev/null
+++ b/python/PyQt/PyQt/common.py.in
@@ -0,0 +1,58 @@
+"""
+***************************************************************************
+    common.py
+    ---------------------
+    Date                 : January 2024
+    Copyright            : (C) 2024 by Nyall Dawson
+    Email                : nyall dot dawson at gmail dot com
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+import functools
+from enum import Enum
+
+def _handle_extended_enum_values(v):
+    """
+    If v is an Enum, returns an integer representation of its value wrapped
+    in the Enum class.
+    Otherwise returns v unchanged.
+    """
+    if isinstance(v, Enum):
+       # v may be an Enum value which itself is an Enum value!
+       # E.g. QNetworkRequest.Attribute(QgsNetworkRequestParameters.RequestAttributes.AttributeInitiatorClass)
+       # in this case v is an Enum of the class QNetworkRequest.Attribute, while v.value is an Enum of the
+       # class QgsNetworkRequestParameters.RequestAttributes. For this to work, we need to extract the integer
+       # value from QgsNetworkRequestParameters.RequestAttributes.AttributeInitiatorClass and then convert it
+       # to a QNetworkRequest.Attribute enum value!
+       if isinstance(v.value, Enum):
+          return v.__class__(int(v.value.value))
+       return v.__class__(int(v.value))
+    return v
+
+def _extended_enum_wrapper(method):
+    """
+    Calls a function, first converting all passed Enum arguments to integer
+    values so that extended enum values work correctly.
+    """
+    @functools.wraps(method)
+    def wrapped(*args, **kwargs):
+        parsed_args = [_handle_extended_enum_values(arg) for arg in args]
+        parsed_kwargs = {k: _handle_extended_enum_values(v) for k, v in kwargs.items()}
+        return method(*parsed_args, **parsed_kwargs)
+
+    return wrapped
+
+
+def install_extended_enum_wrapper(f):
+    """
+    Installs a wrapper on a function so that all passed extended Enum arguments are handled correctly.
+    """
+    return _extended_enum_wrapper(f)
+