---
id: CVE-2026-86334
title: >-
  Path traversal in the CLI client image export and copy functionality in
  Canonical LXD from 4.0.2 before 4.0.14, 5.0.10, 5.21.8, and 6.10 on all
  platforms allows a remote malicious or machine-in-the-middle image server to
  overwrite arbitr…
summary: >-
  Path traversal in the CLI client image export and copy functionality in
  Canonical LXD from 4.0.2 before 4.0.14, 5.0.10, 5.21.8, and 6.10 on all
  platforms allows a remote malicious or machine-in-the-middle image server to
  overwrite arbitr…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L'
cwe:
  - CWE-22
vendor: Canonical
product: LXD
affected:
  - LXD >= 4.0.2 < 4.0.14
  - LXD >= 5.0.0 < 5.0.10
  - LXD >= 5.21.0 < 5.21.8
  - LXD >= 6.0 < 6.10
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T15:12:32.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86334'
references:
  - url: 'https://github.com/canonical/lxd/pull/18940'
    label: security@ubuntu.com
  - url: 'https://github.com/canonical/lxd/pull/18974'
    label: security@ubuntu.com
  - url: 'https://github.com/canonical/lxd/pull/18975'
    label: security@ubuntu.com
  - url: 'https://github.com/canonical/lxd/pull/18976'
    label: security@ubuntu.com
  - url: 'https://github.com/canonical/lxd/pull/18977'
    label: security@ubuntu.com
  - url: 'https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq'
    label: security@ubuntu.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-28T14:12:02.171Z'
---

## Overview

Path traversal in the CLI client image export and copy functionality in Canonical LXD from 4.0.2 before 4.0.14, 5.0.10, 5.21.8, and 6.10 on all platforms allows a remote malicious or machine-in-the-middle image server to overwrite arbitrary local files and execute code on the client system via a crafted Content-Disposition header filename parameter during unified image export or copy operations into a local directory target.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.