CVE-2026-34178 — Importing a crafted backup leads to project restriction bypass
In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/con…
Published: 2026-04-09 · CVSS: 9.1 · CVSS 3.1
In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7