CVE-2026-87798

Medium

Description

Improper 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.

SeverityMedium

CVSS5.8

Exploit probability—

ProductLXD

PublishedSep 28, 2026

First seenSep 28, 2026

Weakness typeCWE-59Improper link resolution

How to fix

Update

Canonical LXD4.0.14, 5.0.10, 5.21.8, 6.9 or later

Vendor advisories

github.com/canonical/lxd/security/advisories/GHSA-mr8v-hx34-hfvf

Affected products

Product	Affected versions	Fixed in
Canonical LXD	4.0.2 ≤ v < 4.0.14, 5.0.0 ≤ v < 5.0.10, 5.21.0 ≤ v < 5.21.8, 6.0 ≤ v < 6.9	4.0.14, 5.0.10, 5.21.8, 6.9

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