CVE-2026-34178
Importing a crafted backup leads to project restriction bypass
CRITICAL 9.1EPSS 0.7%
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.
- Affected
- Canonical · lxd
- CVSS v3.1 UBUNTU
- 9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.68% chance of exploitation in the next 30 days, 51st percentile
- Published
- 2026-04-09