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CVE PROGRAM SOURCE RECORD9.9 Critical

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Canonical LXD

Default version status: unaffected

  • 5.0.0 to < 5.0.8affected
  • 5.21.0 to < 5.21.6affected
  • 6.0 to < 6.10affected

References