by Kastro
Paper/Archive/CVE-2026-72842

CVE-2026-72842

openwrt luci — OpenWrt luci-app-lxc ACL Inconsistency Authentication Bypass

EPSS 0.6%CVSS 9.9
critical.is priorityof 100
40
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 49.4.494 × 209.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
luci≤ 24.10.8–CNA
luci25.12.0 – 25.12.5–CNA

Scores by source

VulnCheck (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/openwrt/luci/security/advisories/GHSA-jf59-v86x-fwf2writeupvulncheck.com/advisories/openwrt-luci-app-lxc-acl-inconsistency-authentication-bypass