webkitgtk is vulnerable to arbitrary code execution. Multiple memory corruption flaws were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash or, potentially, execute arbitrary code with the privileges of the user running the application.
lists.apple.com/archives/security-announce/2010//Jul/msg00001.html
lists.apple.com/archives/security-announce/2010//Nov/msg00003.html
lists.apple.com/archives/security-announce/2010//Sep/msg00002.html
lists.opensuse.org/opensuse-security-announce/2010-10/msg00000.html
lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
secunia.com/advisories/41856
secunia.com/advisories/42314
secunia.com/advisories/43068
secunia.com/advisories/43086
support.apple.com/kb/HT4276
support.apple.com/kb/HT4334
support.apple.com/kb/HT4456
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www.securityfocus.com/bid/42020
www.ubuntu.com/usn/USN-1006-1
www.vupen.com/english/advisories/2010/2722
www.vupen.com/english/advisories/2011/0212
www.vupen.com/english/advisories/2011/0216
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access.redhat.com/errata/RHSA-2011:0177
access.redhat.com/security/updates/classification/#moderate
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11941