# HG changeset patch
# User Benjamin Peterson <benjamin@python.org>
# Date 1402796473 25200
# Node ID 847e288d6e93dba049c280f40979e16a1378d0f6
# Parent  6f1f387759913d91cb307d2783b3a40c48fe7424# Parent  5676797f3a3eccaf38e2c500e77ed39c68923cc9
merge 3.3 (#21766)

diff --git a/Lib/http/server.py b/Lib/http/server.py
--- a/Lib/http/server.py
+++ b/Lib/http/server.py
@@ -977,7 +977,7 @@ class CGIHTTPRequestHandler(SimpleHTTPRe
         (and the next character is a '/' or the end of the string).
 
         """
-        collapsed_path = _url_collapse_path(self.path)
+        collapsed_path = _url_collapse_path(urllib.parse.unquote(self.path))
         dir_sep = collapsed_path.find('/', 1)
         head, tail = collapsed_path[:dir_sep], collapsed_path[dir_sep+1:]
         if head in self.cgi_directories:
diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -485,6 +485,11 @@ class CGIHTTPServerTestCase(BaseTestCase
                 (res.read(), res.getheader('Content-type'), res.status))
         self.assertEqual(os.environ['SERVER_SOFTWARE'], signature)
 
+    def test_urlquote_decoding_in_cgi_check(self):
+        res = self.request('/cgi-bin%2ffile1.py')
+        self.assertEqual((b'Hello World\n', 'text/html', 200),
+                (res.read(), res.getheader('Content-type'), res.status))
+
 
 class SocketlessRequestHandler(SimpleHTTPRequestHandler):
     def __init__(self):