Drupal 7.x before 7.3 allows remote attackers to bypass intended node_access restrictions via vectors related to a listing that shows nodes but lacks a JOIN clause for the node table.
https://bugzilla.redhat.com/show_bug.cgi?id=717874
http://www.securityfocus.com/bid/48505
http://www.openwall.com/lists/oss-security/2011/07/12/16
http://www.openwall.com/lists/oss-security/2011/07/11/2
http://secunia.com/advisories/45291
http://secunia.com/advisories/45081
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062722.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062714.html