Improper access control in LXD - CVE-2026-48751
Published: June 29, 2026
Vulnerability identifier: #VU135799
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-48751
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Containers
Affected software:
LXD
LXD
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary commands on the host.
The vulnerability exists due to improper access control in instance snapshot restoration when restoring snapshots in a restricted project. A remote user can move a crafted instance snapshot into a restricted project and restore it to execute arbitrary commands on the host.
The issue bypasses the restricted.containers.lowlevel=block restriction because snapshots ignore that setting, and exploitation can abuse low-level hooks such as raw.lxc or raw.qemu.
How to mitigate CVE-2026-48751
Install security update from vendor's website.