diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index 8a2e9cd..7e3b25a 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -476,7 +476,8 @@
     try:
         file = _os.fdopen(fd, mode, bufsize)
         return _TemporaryFileWrapper(file, name, delete)
-    except:
+    except BaseException:
+        _os.unlink(name)
         _os.close(fd)
         raise
 
diff --git a/Lib/test/test_tempfile.py b/Lib/test/test_tempfile.py
index 3d0ac57..078e4a9 100644
--- a/Lib/test/test_tempfile.py
+++ b/Lib/test/test_tempfile.py
@@ -827,6 +827,13 @@
             os.close = old_close
             os.fdopen = old_fdopen
 
+    def test_bad_mode(self):
+        dir = tempfile.mkdtemp()
+        self.addCleanup(support.rmtree, dir)
+        with self.assertRaises(TypeError):
+            tempfile.NamedTemporaryFile(mode=(), dir=dir)
+        self.assertEqual(os.listdir(dir), [])
+
     # How to test the mode and bufsize parameters?
 
 test_classes.append(test_NamedTemporaryFile)
diff --git a/Misc/NEWS b/Misc/NEWS
index 012f7d7..ac564b7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -55,6 +55,9 @@
 Library
 -------
 
+- Issue #26385: Remove the file if the internal fdopen() call in
+  NamedTemporaryFile() fails.  Based on patch by Silent Ghost.
+
 - Issue #26309: In the "socketserver" module, shut down the request (closing
   the connected socket) when verify_request() returns false.  Based on patch
   by Aviv Palivoda.