Mention issue6972 in extractall docs about overwriting things outside of
the supplied path.
diff --git a/Doc/library/zipfile.rst b/Doc/library/zipfile.rst
index ec357bb..0577f10 100644
--- a/Doc/library/zipfile.rst
+++ b/Doc/library/zipfile.rst
@@ -207,6 +207,13 @@
be a subset of the list returned by :meth:`namelist`. *pwd* is the password
used for encrypted files.
+ .. warning::
+
+ Never extract archives from untrusted sources without prior inspection.
+ It is possible that files are created outside of *path*, e.g. members
+ that have absolute filenames starting with ``"/"`` or filenames with two
+ dots ``".."``.
+
.. versionadded:: 2.6