Google Chrome before 30.0.1599.66 preserves pending NavigationEntry objects in certain invalid circumstances, which allows remote attackers to spoof the address bar via a URL with a malformed scheme, as demonstrated by a nonexistent:12121 URL.
Exploitability
AV:NAC:MAu:NImpact
C:NI:PA:N4.3/AV:N/AC:M/Au:N/C:N/I:P/A:N