An issue was discovered in Qt before 5.15.15, 6.x before 6.2.10, and 6.3.x through 6.5.x before 6.5.3. There are infinite loops in recursive entity expansion.
https://lists.debian.org/debian-lts-announce/2024/04/msg00027.html
https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html