CVE-2026-66898

Published: Aug 12, 2026Modified: Sep 11, 2026

9.9

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitability: 3.1 / Impact: 6.0

Source: security@ubuntu.com (Secondary)

Description

A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing or restoring a backup archive, LXD fails to validate instance and storage volume names contained within the archive metadata. An attacker can exploit this flaw by supplying a crafted backup archive with malicious instance or volume names containing path traversal sequences, potentially allowing file access or overwriting outside the designated restore directory.

Affected (4)

Products: Canonical: Lxd

1 product

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Canonical Lxd	4.0.0 ≤ version < 4.0.12
Canonical Lxd	5.0.0 ≤ version < 5.0.4
Canonical Lxd	5.1 ≤ version < 5.21.2
Canonical Lxd	Version 6.0

Related CWEs

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (2)

https://github.com/canonical/lxd/security/advisories/GHSA-m857-c7gc-c984

Source: security@ubuntu.com

Vendor AdvisoryExploitMitigation

https://github.com/canonical/lxd/security/advisories/GHSA-m857-c7gc-c984

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Vendor AdvisoryExploitMitigation

Timeline

No history available yet.