A same origin bypass flaw was found in the Shared Worker component of the Chromium browser.
Created chromium tracking bugs for this issue:
Affects: epel-7 [bug 1538531]
Affects: fedora-all [bug 1538533]
This issue has been addressed in the following products:
Red Hat Enterprise Linux 6 Supplementary
Via RHSA-2018:0265 https://access.redhat.com/errata/RHSA-2018:0265