CVE-2026-62420
Cross-project cluster migration bypasses project restrictions via cluster notification flag
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.
INFO
Published Date :
Aug. 12, 2026, 8:17 p.m.
Last Modified :
Oct. 24, 2026, 4:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | cc1ad9ee-3454-478d-9317-d3e869d708bc | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE |
Solution
- Update LXD to the latest version.
- Apply security patches for LXD.
- Review LXD cluster communication security.
- Test instance migration security controls.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-62420.
| URL | Resource |
|---|---|
| https://github.com/canonical/lxd/pull/18605 | Patch |
| https://github.com/canonical/lxd/pull/18651 | Patch |
| https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g | Vendor Advisory Exploit Mitigation |
| https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g | Vendor Advisory Exploit Mitigation |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62420 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-62420
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-62420 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62420 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: LXD de Canonical, Description: Una vulnerabilidad de omisión de autorización en LXD permite a un atacante autenticado omitir las restricciones de seguridad del proyecto de destino durante las migraciones de instancias entre proyectos. Al mover una instancia entre proyectos a un miembro diferente del clúster a través de POST /1.0/instances/{name} con migration: true, project: [target] y target: [member], el nodo de destino omite todas las comprobaciones de restricción del proyecto porque la solicitud llega como una notificación interna del clúster. Un atacante puede explotar esto para introducir configuraciones de instancia no permitidas en un proyecto restringido. Title: LXD de Canonical, Description: Una vulnerabilidad de omisión de autorización en LXD permite a un atacante autenticado omitir las restricciones de seguridad del proyecto de destino durante las migraciones de instancias entre proyectos. Al mover una instancia entre proyectos a un miembro diferente del clúster a través de POST /1.0/instances/{name} con migration: true, project: [target] y target: [member], el nodo de destino omite todas las comprobaciones de restricción del proyecto porque la solicitud llega como una notificación interna del clúster. Un atacante puede explotar esto para introducir configuraciones de instancia no permitidas en un proyecto restringido. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: LXD de Canonical, Description: Una vulnerabilidad de omisión de autorización en LXD permite a un atacante autenticado omitir las restricciones de seguridad del proyecto de destino durante las migraciones de instancias entre proyectos. Al mover una instancia entre proyectos a un miembro diferente del clúster a través de POST /1.0/instances/{name} con migration: true, project: [target] y target: [member], el nodo de destino omite todas las comprobaciones de restricción del proyecto porque la solicitud llega como una notificación interna del clúster. Un atacante puede explotar esto para introducir configuraciones de instancia no permitidas en un proyecto restringido. -
Initial Analysis by [email protected]
Sep. 11, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (excluding) 5.0.8 *cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* versions from (including) 6.0 up to (excluding) 6.10 *cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* versions from (including) 5.1 up to (excluding) 5.21.6 Added Reference Type Canonical Ltd.: https://github.com/canonical/lxd/pull/18605 Types: Patch Added Reference Type Canonical Ltd.: https://github.com/canonical/lxd/pull/18651 Types: Patch Added Reference Type CISA-ADP: https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g Types: Exploit, Mitigation, Vendor Advisory Added Reference Type Canonical Ltd.: https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g Types: Exploit, Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Aug. 12, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/canonical/lxd', 'vendor': 'Canonical', 'product': 'LXD', 'versions': [{'status': 'affected', 'version': '5.0.0', 'lessThan': '5.0.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.21.0', 'lessThan': '5.21.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.0', 'lessThan': '6.10', 'versionType': 'semver'}], 'platforms': ['Linux'], 'packageName': 'LXD', 'defaultStatus': 'unaffected'}] 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-863 Added Reference https://github.com/canonical/lxd/pull/18605 Added Reference https://github.com/canonical/lxd/pull/18651 Added Reference https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 12, 2026
Action Type Old Value New Value Added Reference https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g Added SSVC {'id': 'CVE-2026-62420', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-12T19:26:54.388067Z'}