CVE-2026-86334

EUVD-2026-88255
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
canonicalCNA
4.2 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 26.57%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
canonicallxd
4.0.2 ≤
𝑥
< 4.0.14
CNA
canonicallxd
5.0.0 ≤
𝑥
< 5.0.10
CNA
canonicallxd
5.21.0 ≤
𝑥
< 5.21.8
CNA
canonicallxd
6.0 ≤
𝑥
< 6.10
CNA
Debian logo
Debian Releases
Debian Product
Codename
lxd
bookworm
vulnerable
bookworm (security)
vulnerable
trixie
vulnerable
trixie (security)
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
lxd
bionic
needs-triage
focal
needs-triage
jammy
dne
noble
dne
resolute
dne
xenial
needs-triage
Common Weakness Enumeration
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