Missing validation in Mojo in Google Chrome prior to 69.0.3497.81 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.
https://www.debian.org/security/2018/dsa-4289
https://security.gentoo.org/glsa/201811-10
https://chromereleases.googleblog.com/2018/09/stable-channel-update-for-desktop.html