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Vulnerability record · CVE-2026-63294 · published 12 August 2026

CVE-2026-63294: Canonical lxd link following vulnerability

Canonical · Lxd

A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.

9.9 CVSS 3.1 Critical EPSS 0.88% · top 42.6% CWE-59 · Link following
9.9CVSS 3.1 base score
0.88%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
11 Sep 2026Last modified by NVD

Description

A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4m Third Party AdvisoryExploitMitigation
https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4m Third Party AdvisoryExploitMitigation

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-66897Canonical lxd path traversal vulnerabilityA path traversal vulnerability in LXD's instance template processing allows an attacker with container edit permissions, or any user launching a craf…EPSS 0.72%9.9CVE-2026-66898Canonical lxd path traversal vulnerabilityA path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing …EPSS 0.59%9.9CVE-2026-63293Canonical lxd link following vulnerabilityA link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or un…EPSS 0.59%9.9CVE-2026-63296Canonical lxd incorrect authorization vulnerabilityAn authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When m…EPSS 0.44%9.9CVE-2026-63297Canonical lxd toctou race condition vulnerabilityAn authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target proj…EPSS 0.34%9.9CVE-2026-63298Canonical lxd os command injection vulnerabilityAn improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inje…EPSS 0.69%9.9CVE-2026-63299Canonical lxd allocation without limits vulnerabilityAn authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume limits. Two related code paths fail…EPSS 0.59%9.9CVE-2026-63300Canonical lxd missing authorization vulnerabilityAn improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_c…EPSS 0.54%

Source: NIST National Vulnerability Database (record CVE-2026-63294), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.