Critical severity · published Aug 12, 2026
CVE-2026-63299
Storage volume cross-project move and snapshot restore bypass project disk limits
9.9
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LX
LXD · Canonical
5.0.0 before 5.0.8; 5.21.0 before 5.21.6; 6.0 before 6.10 · source: vendor, NVD
Affected product
LX
LXD
Canonical
More from LXD
9.9
CVE-2026-87799
Arbitrary file write on LXD host via symlink in migration stream
9.9
CVE-2026-85526
Path traversal via Btrfs optimized-backup subvolumes[].path enables root file/dir manipulation in LXD
9.9
CVE-2026-66897
Instance template path traversal allows arbitrary host file write as root
9.9
CVE-2026-66898
Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE
9.9
CVE-2026-63293
Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root