CVE-2026-86334: Canonical Lxd

Medium severity, CVSS 4.2. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Canonical Lxd: from 4.0.2, before 4.0.14 (fixed in 4.0.14); from 5.0.0, before 5.0.10 (fixed in 5.0.10); from 5.21.0, before 5.21.8 (fixed in 5.21.8); from 6.0, before 6.10 (fixed in 6.10)

Published 2026-09-28. Last modified 2026-09-28.