CVEvulnerability

CVE-2026-34178

9.1 CRITICAL Published 2026-04-09 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-04-09
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-20

Description

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 configurations

• canonical lxd (>= 4.12 <= 5.0.6) • canonical lxd (>= 5.21.0 <= 5.21.4) • canonical lxd (>= 6.0 <= 6.7)

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References