Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck

CVE-2026-72842OpenWrt luci-app-lxc ACL Inconsistency Authentication Bypass

Critical 9.9

In plain English

A critical-severity security flaw in luci from openwrt. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.6%top 50.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 (as reported)

Vendor	Product	Versions
openwrt	luci	0 – through 24.10.825.12.0 – through 25.12.5

Weakness: CWE-73 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-jf59-v86x-fwf2) vendor-advisory
VulnCheck Advisory: OpenWrt luci-app-lxc ACL Inconsistency Authentication Bypass third-party-advisory