CVE-2026-86334 Details
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.
A path traversal vulnerability has been identified in the Canonical LXD CLI client, specifically in the image export and copy functionalities. This issue affects versions 4.0.2 prior to 4.0.14, as well as 5.0.10, 5.21.8, and 6.10, across all platforms. The vulnerability allows a remote malicious image server or a machine-in-the-middle to overwrite arbitrary local files and execute code on the client system. This is achieved by exploiting the 'Content-Disposition' header filename parameter during unified image export or copy operations into a local directory target.
Users can update to Canonical LXD versions 4.0.14, 5.0.10, 5.21.8, or 6.10 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 28, 2026CISA-ADP
Assessed Sep 28, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/canonical/lxd/pull/18940 | [email protected] | Issue TrackingVendor |
| https://github.com/canonical/lxd/pull/18974 | [email protected] | Issue TrackingVendor |
| https://github.com/canonical/lxd/pull/18975 | [email protected] | Issue TrackingVendor |
| https://github.com/canonical/lxd/pull/18976 | [email protected] | Issue TrackingVendor |
| https://github.com/canonical/lxd/pull/18977 | [email protected] | Issue TrackingVendor |
| https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq | [email protected] | AdvisoryExploitRemedyVendor |
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 | <= 4.0.2 (semver) <= 7.3.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 28, 2026 | CVE Modified | CISA-ADP |
| Sep 28, 2026 | New CVE Received | [email protected] |