CVE-2026-86334
CLI Path Traversal via Content-Disposition in LXD Image Export/Copy
- State
- Published
- Severity
- 4.2 Medium
- Published
- Sep 28, 2026
- Updated
- Sep 28, 2026
- Reserved
- Sep 7, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.2 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L | canonical |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
LXDCanonical |
|
References
- https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hqvendor-advisoryissue-tracking
- https://github.com/canonical/lxd/pull/18977patch
- https://github.com/canonical/lxd/pull/18976patch
- https://github.com/canonical/lxd/pull/18974patch
- https://github.com/canonical/lxd/pull/18975patch
- https://github.com/canonical/lxd/pull/18940patch
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