Inappropriate implementation in iframe sandbox in Google Chrome prior to 84.0.4147.89 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.
https://www.debian.org/security/2021/dsa-4824
https://security.gentoo.org/glsa/202101-30
https://security.gentoo.org/glsa/202007-08
https://chromereleases.googleblog.com/2020/07/stable-channel-update-for-desktop.html
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00069.html