diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index fececb0dfc40..15ec0e405400 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -141,7 +141,7 @@ jobs:
           path: dist/
 
       - name: Build wheels for CPython 3.14
-        uses: pypa/cibuildwheel@5f22145df44122af0f5a201f93cf0207171beca7  # v3.0.0
+        uses: pypa/cibuildwheel@95d2f3a92fbf80abe066b09418bbf128a8923df2  # v3.0.1
         with:
           package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
         env:
@@ -155,7 +155,7 @@ jobs:
             --upgrade --pre --only-binary=:all: contourpy numpy pillow
 
       - name: Build wheels for CPython 3.13
-        uses: pypa/cibuildwheel@5f22145df44122af0f5a201f93cf0207171beca7  # v3.0.0
+        uses: pypa/cibuildwheel@95d2f3a92fbf80abe066b09418bbf128a8923df2  # v3.0.1
         with:
           package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
         env:
@@ -164,7 +164,7 @@ jobs:
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
 
       - name: Build wheels for CPython 3.12
-        uses: pypa/cibuildwheel@5f22145df44122af0f5a201f93cf0207171beca7  # v3.0.0
+        uses: pypa/cibuildwheel@95d2f3a92fbf80abe066b09418bbf128a8923df2  # v3.0.1
         with:
           package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
         env:
@@ -172,7 +172,7 @@ jobs:
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
 
       - name: Build wheels for CPython 3.11
-        uses: pypa/cibuildwheel@5f22145df44122af0f5a201f93cf0207171beca7  # v3.0.0
+        uses: pypa/cibuildwheel@95d2f3a92fbf80abe066b09418bbf128a8923df2  # v3.0.1
         with:
           package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
         env:
@@ -180,7 +180,7 @@ jobs:
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
 
       - name: Build wheels for PyPy
-        uses: pypa/cibuildwheel@5f22145df44122af0f5a201f93cf0207171beca7  # v3.0.0
+        uses: pypa/cibuildwheel@95d2f3a92fbf80abe066b09418bbf128a8923df2  # v3.0.1
         with:
           package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
         env:
diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
index 4a5b79c0538e..a52343c5d22c 100644
--- a/.github/workflows/cygwin.yml
+++ b/.github/workflows/cygwin.yml
@@ -84,7 +84,7 @@ jobs:
           fetch-depth: 0
           persist-credentials: false
 
-      - uses: cygwin/cygwin-install-action@f61179d72284ceddc397ed07ddb444d82bf9e559  # v5
+      - uses: cygwin/cygwin-install-action@f2009323764960f80959895c7bc3bb30210afe4d  # v6
         with:
           packages: >-
             ccache gcc-g++ gdb git graphviz libcairo-devel libffi-devel
diff --git a/doc/api/next_api_changes/behavior/30272-ES.rst b/doc/api/next_api_changes/behavior/30272-ES.rst
new file mode 100644
index 000000000000..5a03f9bc7972
--- /dev/null
+++ b/doc/api/next_api_changes/behavior/30272-ES.rst
@@ -0,0 +1,2 @@
+``font_manager.findfont`` logs if selected font weight does not match requested
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/doc/devel/MEP/MEP14.rst b/doc/devel/MEP/MEP14.rst
index 2c696adf8a58..d79d3c2d3115 100644
--- a/doc/devel/MEP/MEP14.rst
+++ b/doc/devel/MEP/MEP14.rst
@@ -78,7 +78,7 @@ number of other projects:
 - `Microsoft DirectWrite`_
 - `Apple Core Text`_
 
-.. _pango: https://pango.gnome.org
+.. _pango: https://github.com/GNOME/pango
 .. _harfbuzz: https://github.com/harfbuzz/harfbuzz
 .. _QtTextLayout: https://doc.qt.io/archives/qt-4.8/qtextlayout.html
 .. _Microsoft DirectWrite: https://docs.microsoft.com/en-ca/windows/win32/directwrite/introducing-directwrite
diff --git a/doc/sphinxext/redirect_from.py b/doc/sphinxext/redirect_from.py
index 37b56373a3bf..329352b3a3c8 100644
--- a/doc/sphinxext/redirect_from.py
+++ b/doc/sphinxext/redirect_from.py
@@ -94,10 +94,15 @@ def run(self):
         domain = self.env.get_domain('redirect_from')
         current_doc = self.env.path2doc(self.state.document.current_source)
         redirected_reldoc, _ = self.env.relfn2path(redirected_doc, current_doc)
-        if redirected_reldoc in domain.redirects:
+        if (
+            redirected_reldoc in domain.redirects
+            and domain.redirects[redirected_reldoc] != current_doc
+        ):
             raise ValueError(
                 f"{redirected_reldoc} is already noted as redirecting to "
-                f"{domain.redirects[redirected_reldoc]}")
+                f"{domain.redirects[redirected_reldoc]}\n"
+                f"Cannot also redirect it to {current_doc}"
+            )
         domain.redirects[redirected_reldoc] = current_doc
         return []
 
diff --git a/doc/users/prev_whats_new/changelog.rst b/doc/users/prev_whats_new/changelog.rst
index 8f505e4fdd37..93fd4df2200a 100644
--- a/doc/users/prev_whats_new/changelog.rst
+++ b/doc/users/prev_whats_new/changelog.rst
@@ -1689,7 +1689,7 @@ recent changes, please refer to the :doc:`/users/release_notes`.
     required by the experimental traited config and are somewhat out of date.
     If needed, install them independently, see
     http://code.enthought.com/pages/traits.html and
-    http://www.voidspace.org.uk/python/configobj.html
+    https://configobj.readthedocs.io/en/latest/
 
 2008-12-12
     Added support to assign labels to histograms of multiple data. - MM
diff --git a/lib/matplotlib/_api/__init__.pyi b/lib/matplotlib/_api/__init__.pyi
index 9bf67110bb54..c8ea814fc13d 100644
--- a/lib/matplotlib/_api/__init__.pyi
+++ b/lib/matplotlib/_api/__init__.pyi
@@ -1,6 +1,6 @@
 from collections.abc import Callable, Generator, Iterable, Mapping, Sequence
 from typing import Any, TypeVar, overload
-from typing_extensions import Self  # < Py 3.11
+from typing import Self
 
 from numpy.typing import NDArray
 
diff --git a/lib/matplotlib/axis.pyi b/lib/matplotlib/axis.pyi
index 6119b946fd7b..4bcfb1e1cfb7 100644
--- a/lib/matplotlib/axis.pyi
+++ b/lib/matplotlib/axis.pyi
@@ -1,7 +1,7 @@
 from collections.abc import Callable, Iterable, Sequence
 import datetime
 from typing import Any, Literal, overload
-from typing_extensions import Self  # < Py 3.11
+from typing import Self
 
 import numpy as np
 from numpy.typing import ArrayLike
diff --git a/lib/matplotlib/cbook.pyi b/lib/matplotlib/cbook.pyi
index 6c2d9c303eb2..ad14841463e8 100644
--- a/lib/matplotlib/cbook.pyi
+++ b/lib/matplotlib/cbook.pyi
@@ -14,10 +14,10 @@ from typing import (
     Generic,
     IO,
     Literal,
-    Sequence,
     TypeVar,
     overload,
 )
+from collections.abc import Sequence
 
 _T = TypeVar("_T")
 
diff --git a/lib/matplotlib/dviread.pyi b/lib/matplotlib/dviread.pyi
index 12a9215b5308..82c0238d39d1 100644
--- a/lib/matplotlib/dviread.pyi
+++ b/lib/matplotlib/dviread.pyi
@@ -6,7 +6,7 @@ from enum import Enum
 from collections.abc import Generator
 
 from typing import NamedTuple
-from typing_extensions import Self  # < Py 3.11
+from typing import Self
 
 class _dvistate(Enum):
     pre = ...
diff --git a/lib/matplotlib/font_manager.py b/lib/matplotlib/font_manager.py
index 2db98b75ab2e..ab6b495631de 100644
--- a/lib/matplotlib/font_manager.py
+++ b/lib/matplotlib/font_manager.py
@@ -35,7 +35,7 @@
 from io import BytesIO
 import json
 import logging
-from numbers import Number
+from numbers import Integral
 import os
 from pathlib import Path
 import plistlib
@@ -172,6 +172,10 @@
 ]
 
 
+def _normalize_weight(weight):
+    return weight if isinstance(weight, Integral) else weight_dict[weight]
+
+
 def get_fontext_synonyms(fontext):
     """
     Return a list of file extensions that are synonyms for
@@ -1256,8 +1260,8 @@ def score_weight(self, weight1, weight2):
         # exact match of the weight names, e.g. weight1 == weight2 == "regular"
         if cbook._str_equal(weight1, weight2):
             return 0.0
-        w1 = weight1 if isinstance(weight1, Number) else weight_dict[weight1]
-        w2 = weight2 if isinstance(weight2, Number) else weight_dict[weight2]
+        w1 = _normalize_weight(weight1)
+        w2 = _normalize_weight(weight2)
         return 0.95 * (abs(w1 - w2) / 1000) + 0.05
 
     def score_size(self, size1, size2):
@@ -1480,6 +1484,10 @@ def _findfont_cached(self, prop, fontext, directory, fallback_to_default,
                 best_font = font
             if score == 0:
                 break
+        if best_font is not None and (_normalize_weight(prop.get_weight()) !=
+                                      _normalize_weight(best_font.weight)):
+            _log.warning('findfont: Failed to find font weight %s, now using %s.',
+                         prop.get_weight(), best_font.weight)
 
         if best_font is None or best_score >= 10.0:
             if fallback_to_default:
diff --git a/lib/matplotlib/font_manager.pyi b/lib/matplotlib/font_manager.pyi
index c64ddea3e073..e865f67384cd 100644
--- a/lib/matplotlib/font_manager.pyi
+++ b/lib/matplotlib/font_manager.pyi
@@ -1,14 +1,13 @@
+from collections.abc import Iterable
 from dataclasses import dataclass
+from numbers import Integral
 import os
+from pathlib import Path
+from typing import Any, Literal
 
 from matplotlib._afm import AFM
 from matplotlib import ft2font
 
-from pathlib import Path
-
-from collections.abc import Iterable
-from typing import Any, Literal
-
 font_scalings: dict[str | None, float]
 stretch_dict: dict[str, int]
 weight_dict: dict[str, int]
@@ -19,6 +18,7 @@ MSUserFontDirectories: list[str]
 X11FontDirectories: list[str]
 OSXFontDirectories: list[str]
 
+def _normalize_weight(weight: str | Integral) -> Integral: ...
 def get_fontext_synonyms(fontext: str) -> list[str]: ...
 def list_fonts(directory: str, extensions: Iterable[str]) -> list[str]: ...
 def win32FontDirectory() -> str: ...
diff --git a/lib/matplotlib/sankey.pyi b/lib/matplotlib/sankey.pyi
index 33565b998a9c..083d590559ca 100644
--- a/lib/matplotlib/sankey.pyi
+++ b/lib/matplotlib/sankey.pyi
@@ -2,7 +2,7 @@ from matplotlib.axes import Axes
 
 from collections.abc import Callable, Iterable
 from typing import Any
-from typing_extensions import Self  # < Py 3.11
+from typing import Self
 
 import numpy as np
 
diff --git a/lib/matplotlib/tests/test_api.py b/lib/matplotlib/tests/test_api.py
index f04604c14cce..58e7986bfce6 100644
--- a/lib/matplotlib/tests/test_api.py
+++ b/lib/matplotlib/tests/test_api.py
@@ -13,7 +13,7 @@
 
 
 if typing.TYPE_CHECKING:
-    from typing_extensions import Self
+    from typing import Self
 
 T = TypeVar('T')
 
diff --git a/lib/matplotlib/tests/test_font_manager.py b/lib/matplotlib/tests/test_font_manager.py
index 97ee8672b1d4..24421b8e30b3 100644
--- a/lib/matplotlib/tests/test_font_manager.py
+++ b/lib/matplotlib/tests/test_font_manager.py
@@ -15,7 +15,8 @@
 from matplotlib.font_manager import (
     findfont, findSystemFonts, FontEntry, FontProperties, fontManager,
     json_dump, json_load, get_font, is_opentype_cff_font,
-    MSUserFontDirectories, _get_fontconfig_fonts, ttfFontProperty)
+    MSUserFontDirectories, ttfFontProperty,
+    _get_fontconfig_fonts, _normalize_weight)
 from matplotlib import cbook, ft2font, pyplot as plt, rc_context, figure as mfigure
 from matplotlib.testing import subprocess_run_helper, subprocess_run_for_testing
 
@@ -407,3 +408,29 @@ def test_fontproperties_init_deprecation():
     # Since this case is not covered by docs, I've refrained from jumping
     # extra hoops to detect this possible API misuse.
     FontProperties(family="serif-24:style=oblique:weight=bold")
+
+
+def test_normalize_weights():
+    assert _normalize_weight(300) == 300  # passthrough
+    assert _normalize_weight('ultralight') == 100
+    assert _normalize_weight('light') == 200
+    assert _normalize_weight('normal') == 400
+    assert _normalize_weight('regular') == 400
+    assert _normalize_weight('book') == 400
+    assert _normalize_weight('medium') == 500
+    assert _normalize_weight('roman') == 500
+    assert _normalize_weight('semibold') == 600
+    assert _normalize_weight('demibold') == 600
+    assert _normalize_weight('demi') == 600
+    assert _normalize_weight('bold') == 700
+    assert _normalize_weight('heavy') == 800
+    assert _normalize_weight('extra bold') == 800
+    assert _normalize_weight('black') == 900
+    with pytest.raises(KeyError):
+        _normalize_weight('invalid')
+
+
+def test_font_match_warning(caplog):
+    findfont(FontProperties(family=["DejaVu Sans"], weight=750))
+    logs = [rec.message for rec in caplog.records]
+    assert 'findfont: Failed to find font weight 750, now using 700.' in logs
diff --git a/lib/matplotlib/typing.py b/lib/matplotlib/typing.py
index e3719235cdb8..270da6bcd5e0 100644
--- a/lib/matplotlib/typing.py
+++ b/lib/matplotlib/typing.py
@@ -12,7 +12,8 @@
 """
 from collections.abc import Hashable, Sequence
 import pathlib
-from typing import Any, Callable, Literal, TypeAlias, TypeVar, Union
+from typing import Any, Literal, TypeAlias, TypeVar, Union
+from collections.abc import Callable
 
 from . import path
 from ._enums import JoinStyle, CapStyle
@@ -69,7 +70,16 @@
 )
 """See :doc:`/gallery/lines_bars_and_markers/markevery_demo`."""
 
-MarkerType: TypeAlias = str | path.Path | MarkerStyle
+MarkerType: TypeAlias = (
+    path.Path | MarkerStyle | str |  # str required for "$...$" marker
+    Literal[
+        ".", ",", "o", "v", "^", "<", ">",
+        "1", "2", "3", "4", "8", "s", "p",
+        "P", "*", "h", "H", "+", "x", "X",
+        "D", "d", "|", "_", "none", " ",
+        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
+    ] | list[tuple[int, int]] | tuple[int, Literal[0, 1, 2], int]
+)
 """
 Marker specification. See :doc:`/gallery/lines_bars_and_markers/marker_reference`.
 """
diff --git a/pyproject.toml b/pyproject.toml
index b580feff930e..b06a5bcc5740 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -140,6 +140,7 @@ select = [
     "E",
     "F",
     "W",
+    "UP035",
     # The following error codes require the preview mode to be enabled.
     "E201",
     "E202",