From 99c2eaa6d4012bd949b4528817c5a475bbe6ed5f Mon Sep 17 00:00:00 2001
From: yuanx749 <yuanx749@gmail.com>
Date: Sat, 4 Jul 2026 00:26:06 +0300
Subject: [PATCH 1/3] Add test

---
 Lib/test/test_tarfile.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
index 2998a3667b4d17d..692f97d1f711307 100644
--- a/Lib/test/test_tarfile.py
+++ b/Lib/test/test_tarfile.py
@@ -254,6 +254,14 @@ def test_add_dir_getmember(self):
         self.add_dir_and_getmember('bar')
         self.add_dir_and_getmember('a'*101)
 
+    def test_extract_name_with_trailing_slash(self):
+        with tarfile.open(tmpname, 'w') as tar:
+            tar.addfile(tarfile.TarInfo('./mydir/'))
+        with tarfile.open(tmpname) as tar:
+            names = tar.getnames()
+            self.assertEqual(names, ['./mydir/'])
+            tar.extract(names[0], TEMPDIR, filter='fully_trusted')
+
     @unittest.skipUnless(hasattr(os, "getuid") and hasattr(os, "getgid"),
                          "Missing getuid or getgid implementation")
     def add_dir_and_getmember(self, name):

From 83bf44e05b0742a3e11e68ef5b1d9d54aa6c58ec Mon Sep 17 00:00:00 2001
From: yuanx749 <yuanx749@gmail.com>
Date: Sat, 4 Jul 2026 00:26:15 +0300
Subject: [PATCH 2/3] Fix lookup

---
 Lib/tarfile.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Lib/tarfile.py b/Lib/tarfile.py
index 385dbb536d8a7dc..844a2aa25fdccfd 100644
--- a/Lib/tarfile.py
+++ b/Lib/tarfile.py
@@ -2174,7 +2174,9 @@ def getmember(self, name):
            than once in the archive, its last occurrence is assumed to be the
            most up-to-date version.
         """
-        tarinfo = self._getmember(name.rstrip('/'))
+        tarinfo = self._getmember(name)
+        if tarinfo is None and name.endswith('/'):
+            tarinfo = self._getmember(name.rstrip('/'))
         if tarinfo is None:
             raise KeyError("filename %r not found" % name)
         return tarinfo

From 05aa6389673ee20fa12a1be17a5b815de41f4410 Mon Sep 17 00:00:00 2001
From: yuanx749 <yuanx749@gmail.com>
Date: Sat, 4 Jul 2026 00:26:26 +0300
Subject: [PATCH 3/3] Add NEWS

---
 .../Library/2026-07-04-00-19-23.gh-issue-127636.o_uD9U.rst     | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2026-07-04-00-19-23.gh-issue-127636.o_uD9U.rst

diff --git a/Misc/NEWS.d/next/Library/2026-07-04-00-19-23.gh-issue-127636.o_uD9U.rst b/Misc/NEWS.d/next/Library/2026-07-04-00-19-23.gh-issue-127636.o_uD9U.rst
new file mode 100644
index 000000000000000..51957a73b5603b2
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-07-04-00-19-23.gh-issue-127636.o_uD9U.rst
@@ -0,0 +1,3 @@
+Fix :meth:`tarfile.TarFile.extract` to accept archive member names with a
+trailing forward slash, including those returned by
+:meth:`tarfile.TarFile.getnames`. Contributed by Xiao Yuan.