CVE-2018-17175

In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python,
the schema “only” option treats an empty list as implying no “only” option,
which allows a request that was intended to expose no fields to instead
expose all fields (if the schema is being filtered dynamically using the
“only” option, and there is a user role that produces an empty value for
“only”).

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=909140&gt;