The internationalization (i18n) framework in Django 0.91, 0.95, 0.95.1, and 0.96, and as used in other products such as PyLucid, when the USE_I18N option and the i18n component are enabled, allows remote attackers to cause a denial of service (memory consumption) via many HTTP requests with large Accept-Language headers.
https://www.redhat.com/archives/fedora-package-announce/2007-November/msg00257.html
https://www.redhat.com/archives/fedora-package-announce/2007-November/msg00243.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/38143
http://www.vupen.com/english/advisories/2007/3661
http://www.vupen.com/english/advisories/2007/3660
http://www.securityfocus.com/bid/26227
http://www.djangoproject.com/weblog/2007/oct/26/security-fix
http://www.debian.org/security/2008/dsa-1640
http://sourceforge.net/forum/forum.php?forum_id=749199
http://secunia.com/advisories/31961