Cloudanix VulnDB

CVE-2026-63300

Critical · 9.9

CVSS

9.9

EPSS

0.5%

Published

Aug 12, 2026

CISA due date

—

The record

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 packages

Ecosystem Package Introduced Fixed

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