Jython 2.2.1 uses the current umask to set the privileges of the class cache files, which allows local users to bypass intended access restrictions via unspecified vectors.
https://bugzilla.redhat.com/show_bug.cgi?id=947949
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://lists.opensuse.org/opensuse-updates/2015-02/msg00055.html