CVE-2026-66898

CRITICAL9.9

Published 2026-08-12 · Source security@ubuntu.com

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.

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

CWE-22

References

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

View on NVD

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