Incorrect handling of blob URLS in Site Isolation in Google Chrome prior to 71.0.3578.80 allowed a remote attacker who had compromised the renderer process to bypass site isolation protections via a crafted HTML page.
https://access.redhat.com/errata/RHSA-2018:3803
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop.html