Insufficient input validation in ABR allows a low-privileged user to inject malicious entries into the sudoers file, resulting in persistent root access that remained effective after the ABR session ended.
https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-110/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-66332
https://docs.adminbyrequest.com/security-advisories/abr-mac-26-02.htm