Improper access control in LXD - CVE-2026-48751
Published: June 29, 2026
Vulnerability identifier: #VU135799
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-48751
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
LXD
Debian Linux
lxd (Debian package)
Debian Linux
lxd (Debian package)
How to mitigate CVE-2026-48751
Install security update from vendor's website.
LXD - addressed in versions 5.0.7, 5.21.5, 6.9
lxd (Debian package) - update to 5.0.2+git20231211.1364ae4-9+deb13u7
lxd (Debian package) - update to 5.0.2+git20231211.1364ae4-9+deb13u7