by Kastro
Paper/Archive/CVE-2026-63296

CVE-2026-63296

Canonical LXD — Project restriction bypass via instance migration config override

EPSS 0.4%public exploitCVSS 9.9
critical.is priorityof 100
47
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 38.7.387 × 207.7Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When migrating an instance to a target project, LXD accepts configuration overrides without validating the new configuration against the target project's enforced restrictions. An attacker can exploit this flaw to move instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.

Affected

ProductAffectedFixed inSource
LXD5.0.0 – < 5.0.85.0.8CNA
LXD5.21.0 – < 5.21.65.21.6CNA
LXD6.0 – < 6.106.10CNA

Scores by source

canonical (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/canonical/lxd/security/advisories/GHSA-gcr9-5q6r-w625