STINNER Victor added the comment:

"You should ensure that loaded bytes are ASCII-only. Otherwise broken or 
malicious marshalled data will compromise you program."

This is not new, see the red warning in marshal doc:

"""
Warning

The marshal module is not intended to be secure against erroneous or 
maliciously constructed data. Never unmarshal data received from an untrusted 
or unauthenticated source.
"""

----------

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue19219>
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