LXD client recursive file pull allows directory escape via malicious VM agent

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-87798
StatePUBLISHED
Assignercanonical
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-28 14:17:21 UTC
Updated2026-09-28 17:17:51 UTC
DescriptionImproper link resolution in the recursive file pull feature of the LXD CLI client in Canonical LXD versions 4.0.2 up to 6.9 (fixed in 4.0.14, 5.0.10 and 5.21.8) on Linux allows an attacker with root access inside a virtual machine to write attacker-controlled files or directory trees to arbitrary paths on the client host, with the operator's privileges. The attacker does this by using a modified lxd-agent that returns inconsistent SFTP directory listings and Lstat results.

Risk And Classification

Primary CVSS: v3.1 5.8 MEDIUM from [email protected]

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

EPSS: 0.001880000 probability, percentile 0.075410000 (date 2026-09-29)

Problem Types: CWE-59 | CWE-59 CWE-59 Improper link resolution before file access ('link following')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N
3.1CNACVSS5.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N

CVSS v3.1 Breakdown

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

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

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 6.9 semver Linux

References

ReferenceSourceLinkTags
github.com/canonical/lxd/security/advisories/GHSA-mr8v-hx34-hfvf [email protected] 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 or later.

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