The XSLT functionality in WebKit in Apple Safari before 4.0 does not properly implement the document function, which allows remote attackers to read (1) arbitrary local files and (2) files from different security zones via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/51267
http://www.vupen.com/english/advisories/2011/0212
http://www.vupen.com/english/advisories/2009/1522
http://www.ubuntu.com/usn/USN-857-1
http://support.apple.com/kb/HT3613
http://secunia.com/advisories/43068
http://secunia.com/advisories/35379
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
http://lists.apple.com/archives/security-announce/2009/jun/msg00002.html