Description
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations. When moving an instance cross-project to a different cluster member via POST /1.0/instances/{name} with migration: true, project: <target>, and target: <member>, the destination node skips all project restriction checks because the request arrives as an internal cluster notification. An attacker can exploit this to introduce disallowed instance configurations into a restricted project.
Published: 2026-08-12
Score: 9.9 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to LXD version 5.0.8 or later, 5.21.6 or later, or 6.10 or later.

Tracking

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Advisories

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History

Wed, 12 Aug 2026 21:15:00 +0000

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

Wed, 12 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Description An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations. When moving an instance cross-project to a different cluster member via POST /1.0/instances/{name} with migration: true, project: <target>, and target: <member>, the destination node skips all project restriction checks because the request arrives as an internal cluster notification. An attacker can exploit this to introduce disallowed instance configurations into a restricted project.
Title Cross-project cluster migration bypasses project restrictions via cluster notification flag
Weaknesses CWE-863
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: 2026-08-12T19:27:44.371Z

Reserved: 2026-07-14T08:57:47.667Z

Link: CVE-2026-62420

cve-icon Vulnrichment

Updated: 2026-08-12T19:27:36.844Z

cve-icon NVD

Status : Received

Published: 2026-08-12T20:17:46.897

Modified: 2026-08-12T20:17:46.897

Link: CVE-2026-62420

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-12T21:00:03Z

Weaknesses