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Vulnerabilities CVE-2026-62420

CVE-2026-62420

Critical
Open
TLP:CLEAR

Cross-project cluster migration bypasses project restrictions via cluster notification flag

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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.

Details

CVSS Score
9.9
EPSS Score
0.31%

23.2th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Confidence
90%
Published
Aug 12, 2026
Last Modified
Aug 12, 2026
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