QXmlSimpleReader in Qt before 5.2 allows context-dependent attackers to cause a denial of service (memory consumption) via an XML Entity Expansion (XEE) attack.
blog.qt.digia.com/blog/2014/04/24/qt-4-8-6-released/
lists.fedoraproject.org/pipermail/package-announce/2014-May/132395.html
lists.opensuse.org/opensuse-updates/2014-01/msg00044.html
lists.opensuse.org/opensuse-updates/2014-01/msg00047.html
lists.opensuse.org/opensuse-updates/2014-01/msg00085.html
lists.opensuse.org/opensuse-updates/2014-01/msg00104.html
lists.opensuse.org/opensuse-updates/2014-01/msg00106.html
lists.qt-project.org/pipermail/announce/2013-December/000036.html
secunia.com/advisories/56008
secunia.com/advisories/56166
www.ubuntu.com/usn/USN-2057-1
codereview.qt-project.org/#change%2C71010
codereview.qt-project.org/#change%2C71368