Description
A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.
Published: 2026-08-12
Score: 9.9 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to LXD version 4.0.12 or later, 5.0.8 or later, or 5.12.6 or later, or 6.10 or later.

Tracking

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Advisories

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History

Thu, 13 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Canonical
Canonical lxd
Vendors & Products Canonical
Canonical lxd

Wed, 12 Aug 2026 20:15:00 +0000

Type Values Removed Values Added
Description A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.
Title Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root
Weaknesses CWE-59
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: canonical

Published:

Updated: 2026-08-13T12:40:35.947Z

Reserved: 2026-07-16T09:49:29.911Z

Link: CVE-2026-63293

cve-icon Vulnrichment

Updated: 2026-08-13T12:39:54.249Z

cve-icon NVD

Status : Received

Published: 2026-08-12T20:17:47.060

Modified: 2026-08-13T13:19:14.333

Link: CVE-2026-63293

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-12T23:15:03Z

Weaknesses
  • CWE-59

    Improper Link Resolution Before File Access ('Link Following')