bpo-35755: Remove current directory from posixpath.defpath (GH-11586)

Document the change in a NEWS entry of the Security category.
python · Apr 17, 2019 · 2c4c02f · 2c4c02f
1 parent 228a3c9
commit 2c4c02f
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diff --git a/Lib/posixpath.py b/Lib/posixpath.py
@@ -18,7 +18,7 @@
 extsep = '.'
 sep = '/'
 pathsep = ':'
-defpath = ':/bin:/usr/bin'
+defpath = '/bin:/usr/bin'
 altsep = None
 devnull = '/dev/null'
 

diff --git a/Misc/NEWS.d/next/Security/2019-01-17-10-03-48.bpo-35755.GmllIs.rst b/Misc/NEWS.d/next/Security/2019-01-17-10-03-48.bpo-35755.GmllIs.rst
@@ -0,0 +1,5 @@
+:func:`shutil.which` now uses ``os.confstr("CS_PATH")`` if available and if the
+:envvar:`PATH` environment variable is not set. Remove also the current
+directory from :data:`posixpath.defpath`. On Unix, :func:`shutil.which` and the
+:mod:`subprocess` module no longer search the executable in the current
+directory if the :envvar:`PATH` environment variable is not set.