{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63300", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "state": "PUBLISHED", "assignerShortName": "canonical", "dateReserved": "2026-07-16T10:01:05.653Z", "datePublished": "2026-08-12T19:09:04.445Z", "dateUpdated": "2026-08-12T19:09:04.445Z"}, "containers": {"cna": {"title": "Cross-project instance move bypasses all project restrictions allowing host command execution", "descriptions": [{"lang": "en", "value": "An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project."}], "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"}, {"version": "6.0", "status": "affected", "versionType": "semver", "lessThan": "6.10"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-862 Missing Authorization", "cweId": "CWE-862", "type": "CWE"}]}], "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2", "tags": ["vdb-entry", "vendor-advisory"]}, {"url": "https://github.com/canonical/lxd/pull/18651", "tags": ["patch"]}, {"url": "https://github.com/canonical/lxd/pull/18605", "tags": ["patch"]}], "impacts": [{"capecId": "CAPEC-180", "descriptions": [{"lang": "en", "value": "Exploiting Incorrectly Configured Access Control Security Levels"}]}, {"capecId": "CAPEC-122", "descriptions": [{"lang": "en", "value": "Privilege Abuse"}]}, {"capecId": "CAPEC-233", "descriptions": [{"lang": "en", "value": "Privilege Escalation"}]}], "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, 5.21.6 or later, or 6.10 or later."}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-08-12T19:09:04.445Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "LXD", "platforms": ["Linux"], "product": "LXD", "repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "versions": [{"lessThan": "5.0.8", "status": "affected", "version": "5.0.0", "versionType": "semver"}, {"lessThan": "5.21.6", "status": "affected", "version": "5.21.0", "versionType": "semver"}, {"lessThan": "6.10", "status": "affected", "version": "6.0", "versionType": "semver"}]}], "source": "security@ubuntu.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project."}], "id": "CVE-2026-63300", "lastModified": "2026-08-12T20:17:47.953", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "security@ubuntu.com", "type": "Secondary"}]}, "published": "2026-08-12T20:17:47.953", "references": [{"source": "security@ubuntu.com", "url": "https://github.com/canonical/lxd/pull/18605"}, {"source": "security@ubuntu.com", "url": "https://github.com/canonical/lxd/pull/18651"}, {"source": "security@ubuntu.com", "url": "https://github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

{}

{}