CLI Path Traversal via Content-Disposition in LXD Image Export/Copy

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-86334
StatePUBLISHED
Assignercanonical
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-28 14:17:20 UTC
Updated2026-09-28 18:17:25 UTC
DescriptionPath 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.

Risk And Classification

Primary CVSS: v3.1 4.2 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

EPSS: 0.003350000 probability, percentile 0.243850000 (date 2026-09-29)

Problem Types: CWE-22 | CWE-22 CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
3.1CNACVSS4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Canonical LXD affected 4.0.2 4.0.14 semver Linux
CNA Canonical LXD affected 5.0.0 5.0.10 semver Linux
CNA Canonical LXD affected 5.21.0 5.21.8 semver Linux
CNA Canonical LXD affected 6.0 6.10 semver Linux

References

ReferenceSourceLinkTags
github.com/canonical/lxd/pull/18940 [email protected] github.com
github.com/canonical/lxd/pull/18975 [email protected] github.com
github.com/canonical/lxd/pull/18977 [email protected] github.com
github.com/canonical/lxd/pull/18976 [email protected] github.com
github.com/canonical/lxd/pull/18974 [email protected] github.com
github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to LXD versions 4.0.14, 5.0.10, 5.21.8, 6.10 or later.

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