Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE (Canonical LXD)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.59 % · percentile 48 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- canonical
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-22 — Improper Limitation of a Pathname to a Restricted Directory
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | canonical |
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · security@ubuntu.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-57545
- GCVE · GCVE-0-2026-66898
Affected configurations (NVD CPE)
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*≥ 4.0.0 < 4.0.12cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*≥ 5.0.0 < 5.0.4cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*≥ 5.1 < 5.21.2cpe:2.3:a:canonical:lxd:6.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Canonical · LXD | affected 4.0.0 < 4.0.12 ; affected 5.0.0 < 5.0.4 ; affected 5.21.0 < 5.21.2 ; affected 6.0 < 6.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |