mod_python is an Apache module that embeds the Python interpreter within the server allowing Python-based web-applications to be created.
Graham Dumpleton discovered a vulnerability in mod_python's Publisher Handler.
By requesting a specially crafted URL for a published module page, an attacker could obtain information about restricted variables.
There is no known workaround at this time.
All mod_python users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose www-apache/mod_python