CVE-2026-86334

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.

CVSS Vector

References

• https://github.com/canonical/lxd/pull/18940
• https://github.com/canonical/lxd/pull/18974
• https://github.com/canonical/lxd/pull/18975
• https://github.com/canonical/lxd/pull/18976
• https://github.com/canonical/lxd/pull/18977
• https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq
• https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq