In GNOME Epiphany before 41.4 and 42.x before 42.2, an HTML document can trigger a client buffer overflow (in ephy_string_shorten in the UI process) via a long page title. The issue occurs because the number of bytes for a UTF-8 ellipsis character is not properly considered.
https://www.debian.org/security/2022/dsa-5208
https://lists.debian.org/debian-lts-announce/2022/08/msg00006.html
https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1106