{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34178","assignerOrgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","state":"PUBLISHED","assignerShortName":"canonical","dateReserved":"2026-03-26T09:24:08.449Z","datePublished":"2026-04-09T09:18:58.404Z","dateUpdated":"2026-04-09T11:55:20.431Z"},"containers":{"cna":{"title":"Importing a crafted backup leads to project restriction bypass","affected":[{"vendor":"Canonical","product":"lxd","platforms":["Linux"],"collectionURL":"https://github.com/canonical","packageName":"lxd","repo":"https://github.com/canonical/lxd","programFiles":["permissions.go"],"versions":[{"status":"affected","version":"4.12.0","lessThan":"5.0.7","versionType":"semver"},{"status":"affected","version":"5.1.0","lessThan":"5.21.5","versionType":"semver"},{"status":"affected","version":"6.0.0","lessThan":"6.8.0","versionType":"semver"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-20","description":"CWE-20 Improper input validation","type":"CWE"}]}],"descriptions":[{"lang":"en","value":"In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise."}],"references":[{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-q96j-3fmm-7fv4","name":"Importing a crafted backup leads to project restriction bypass","tags":["vdb-entry","vendor-advisory"]},{"url":"https://github.com/canonical/lxd/pull/17921","name":"Import: Create backup config from index","tags":["patch","issue-tracking"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"CRITICAL","baseScore":9.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"}}],"credits":[{"lang":"en","value":"Miha Purg","type":"finder"}],"source":{"discovery":"INTERNAL"},"providerMetadata":{"orgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","shortName":"canonical","dateUpdated":"2026-04-09T09:18:58.404Z"}},"adp":[{"references":[{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-q96j-3fmm-7fv4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-09T11:54:57.626476Z","id":"CVE-2026-34178","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":"2026-04-09T11:55:20.431Z"}}]}}