{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63297","assignerOrgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","state":"PUBLISHED","assignerShortName":"canonical","dateReserved":"2026-07-16T09:49:29.911Z","datePublished":"2026-08-12T19:25:24.420Z","dateUpdated":"2026-08-13T14:29:39.772Z"},"containers":{"cna":{"title":"Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge","descriptions":[{"lang":"en","value":"An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target project restrictions during cross-project instance copies. When copying an instance to a target project, LXD performs restriction checks before configuration merging is complete, creating a time-of-check to time-of-use (TOCTOU) condition. An attacker can exploit this flaw to copy instances with disallowed high-privilege configurations into restricted projects, bypassing security controls."}],"affected":[{"vendor":"Canonical","product":"LXD","packageName":"LXD","platforms":["Linux"],"repo":"https://github.com/canonical/lxd","defaultStatus":"unaffected","versions":[{"version":"5.0.0","status":"affected","versionType":"semver","lessThan":"5.0.8"},{"version":"5.21.0","status":"affected","versionType":"semver","lessThan":"5.21.6"}]}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition","cweId":"CWE-367"},{"type":"CWE","lang":"en","description":"CWE-863 Incorrect Authorization","cweId":"CWE-863"}]}],"impacts":[{"capecId":"CAPEC-1","descriptions":[{"lang":"en","value":"Accessing Functionality Not Properly Constrained by ACLs"}]},{"capecId":"CAPEC-122","descriptions":[{"lang":"en","value":"Privilege Abuse"}]},{"capecId":"CAPEC-233","descriptions":[{"lang":"en","value":"Privilege Escalation"}]}],"references":[{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-v989-qw7w-xvg4","tags":["vdb-entry","vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL"}}],"source":{"discovery":"EXTERNAL"},"solutions":[{"lang":"en","value":"Upgrade to LXD version 5.0.8 or later, or 5.12.6 or later."}],"providerMetadata":{"orgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","shortName":"canonical","dateUpdated":"2026-08-12T19:25:24.420Z"}},"adp":[{"references":[{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-v989-qw7w-xvg4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T14:28:52.383092Z","id":"CVE-2026-63297","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-13T14:29:39.772Z"}}]}}