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CVE-2026-66898 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:9.9 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/canonical/lxd/security/advisories/GHSA-m857-c7gc-c984	CISA-ADP	Vendor AdvisoryExploitMitigation
https://github.com/canonical/lxd/security/advisories/GHSA-m857-c7gc-c984	[email protected]	Vendor AdvisoryExploitMitigation

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')	[email protected]

Affected Products

Product	Versions
canonical lxd	>= 4.0.0, < 4.0.12 >= 5.0.0, < 5.0.4 >= 5.1, < 5.21.2 6.0
CPE cpe:2.3:a:canonical:lxd:::::::: cpe:2.3:a:canonical:lxd:6.0:::::::* Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Sep 11, 2026	Initial Analysis	[email protected]
Aug 13, 2026	CVE Modified	CISA-ADP
Aug 12, 2026	New CVE Received	[email protected]