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CVE-2026-63300

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.0.8, 5.21.6, 6.10
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • LXD

    From 5.0.0 · fixed in 5.0.8; From 5.21.0 · fixed in 5.21.6; From 6.0 · fixed in 6.10

References 3

GitHub · canonical/lxd