CVE-2026-63300
criticalpriority · track · 0OT risk · elevatedEPSS 0.005 · 45 %ileEUUSEPSS · scored 2026-10-29
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (6)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
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references (9)
External citations — patches, advisories, analysis.
- https://github.com/canonical/lxd/pull/18605cnnvd
- https://github.com/canonical/lxd/pull/18651cnnvd
- https://github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2cnnvd
- https://github.com/canonical/lxd/pull/18605enisa_euvd
- https://github.com/canonical/lxd/pull/18651enisa_euvd
- https://github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2enisa_euvd
- https://github.com/canonical/lxd/pull/18605ExploitPatchnvd
- https://github.com/canonical/lxd/pull/18651Patchnvd
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