CVE-2026-34178

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.

The following products are affected by CVE-2026-34178 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34178.

URL	Resource
https://github.com/canonical/lxd/pull/17921
https://github.com/canonical/lxd/security/advisories/GHSA-q96j-3fmm-7fv4