CVE-2026-63299: An authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume…
CVE-2026-63299 · Severity: critical · CVSS 9.9 · Published 2026-08-12
An authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume limits. Two related code paths fail to verify resource limits during volume operations: the storagePoolVolumeTypePostMove function omits the limits.AllowVolumeCreation check before moving a volume across projects, and volume snapshot restore operations skip the AllowVolumeUpdate check when the configuration is nil (Config == nil). An attacker can exploit these flaws to allocate storage resources that exceed the administrative limits configured for a project.
No. Junglewise Threat Intelligence has no report of CVE-2026-63299 being exploited in the wild.
How severe is CVE-2026-63299?
Critical severity, with a CVSS score of 9.9, published 12 August 2026.
Which products and versions are affected?
Canonical LXD. The advisory does not name versions.
Is there a fix for CVE-2026-63299?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-63299?
Check whether you run Canonical LXD. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.