CVE-2026-34178
published 2026-04-09CVE-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…
critical9.1CVSS 3.1
AVNACLPRHUINSCCHIHAH
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
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | lxd | 4.12 – 5.0.6 | — |
| canonical | lxd | >= 4.12.0 < 5.0.7 | 5.0.7 |
| canonical | lxd | >= 5.1.0 < 5.21.5 | 5.21.5 |
| canonical | lxd | 5.21.0 – 5.21.4 | — |
| canonical | lxd | 6.0 – 6.7 | — |
| canonical | lxd | >= 6.0.0 < 6.8.0 | 6.8.0 |
| github.com | canonical_lxd | 0.0.0-20210305023314-538ac3df036e – 0.0.0-20260226085519-736f34afb267 | — |