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-rw-r--r--Doc/library/security_warnings.rst6
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diff --git a/Doc/library/security_warnings.rst b/Doc/library/security_warnings.rst
index 26b015c..f985dc4 100644
--- a/Doc/library/security_warnings.rst
+++ b/Doc/library/security_warnings.rst
@@ -32,3 +32,9 @@ The following modules have specific security considerations:
* :mod:`xml`: :ref:`XML vulnerabilities <xml-vulnerabilities>`
* :mod:`zipfile`: :ref:`maliciously prepared .zip files can cause disk volume
exhaustion <zipfile-resources-limitations>`
+
+The :option:`-I` command line option can be used to run Python in isolated
+mode. When it cannot be used, the :option:`-P` option or the
+:envvar:`PYTHONSAFEPATH` environment variable can be used to not prepend a
+potentially unsafe path to :data:`sys.path` such as the current directory, the
+script's directory or an empty string.