CVE-2006-1446
Keychain in Apple Mac OS X 10.3.9 and 10.4.6 might allow an application to bypass a locked Keychain by first obtaining a reference to the Keychain when it is unlocked, then reusing that reference after the Keychain has been locked.
Date published : 2006-05-12
http://lists.apple.com/archives/security-announce/2006/May/msg00003.html