The WebContentsImpl::FocusLocationBarByDefault function in content/browser/web_contents/web_contents_impl.cc in Google Chrome before 50.0.2661.75 mishandles focus for certain about:blank pages, which allows remote attackers to spoof the address bar via a crafted URL.
https://security.gentoo.org/glsa/201605-02
https://codereview.chromium.org/1678233003/
http://www.debian.org/security/2016/dsa-3549
http://rhn.redhat.com/errata/RHSA-2016-0638.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00050.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00049.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00040.html
http://googlechromereleases.blogspot.com/2016/04/stable-channel-update_13.html