CVE-2026-72842: Openwrt Luci

Critical severity, CVSS 9.9. EPSS: 0.6% chance of exploitation in the next 30 days.

luci-app-lxc contains an ACL inconsistency vulnerability that allows low-privileged authenticated LuCI users to access backend container management routes without proper authorization checks. Attackers can exploit path traversal via `/.%2E` in the `lxc_name` parameter to escape container directories and control host-side scripts executed through `lxc.hook.start-host`, achieving root code execution on the OpenWrt host.

Affected products

• Openwrt Luci: up to and including 24.10.8; from 25.12.0, up to and including 25.12.5

Published 2026-08-13. Last modified 2026-09-30.