CVE-2026-63296

Critical

Description

An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When migrating an instance to a target project, LXD accepts configuration overrides without validating the new configuration against the target project's enforced restrictions. An attacker can exploit this flaw to move instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.

SeverityCritical

CVSS9.9

Exploit probability—

ProductCanonical Lxd

PublishedAug 12, 2026

First seenAug 12, 2026

Weakness typeCWE-863Incorrect authorization

How to fix

Update

canonical lxd5.0.8, 5.21.6, 6.10 or later

Vendor advisories

github.com/canonical/lxd/security/advisories/GHSA-gcr9-5q6r-w625

Affected products

Product	Affected versions	Fixed in
canonical lxd	5.0.0 ≤ v < 5.0.8, 5.1 ≤ v < 5.21.6, 6.0 ≤ v < 6.10	5.0.8, 5.21.6, 6.10

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