In Linaro Automated Validation Architecture (LAVA) before 2022.11, users with valid credentials can submit crafted XMLRPC requests that cause a recursive XML entity expansion, leading to excessive use of memory on the server and a Denial of Service.
https://www.debian.org/security/2023/dsa-5318
https://lists.debian.org/debian-lts-announce/2023/01/msg00016.html