Skip to content
CVE PROGRAM SOURCE RECORD9.9 Critical

CVE-2026-63300

Cross-project instance move bypasses all project restrictions allowing host command execution

Description

An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Canonical LXD

Default version status: unaffected

  • 5.0.0 to < 5.0.8affected
  • 5.21.0 to < 5.21.6affected
  • 6.0 to < 6.10affected

References