CVE-2026-63299: 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…

PriorityP266critical9.9CVSS 3.1

AVNACLPRLUINSCCHIHAH

EPSS

0.28%

20.4th percentile

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.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
canonical	lxd	>= 5.0.0 < 5.0.8	5.0.8
canonical	lxd	>= 5.21.0 < 5.21.6	5.21.6
canonical	lxd	>= 6.0 < 6.10	6.10

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