CVE-2026-66898

{"id": "CVE-2026-66898", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66898", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-13T13:40:15.405663Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security@ubuntu.com", "affectedData": [{"repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "product": "LXD", "versions": [{"status": "affected", "version": "4.0.0", "lessThan": "4.0.12", "versionType": "semver"}, {"status": "affected", "version": "5.0.0", "lessThan": "5.0.4", "versionType": "semver"}, {"status": "affected", "version": "5.21.0", "lessThan": "5.21.2", "versionType": "semver"}, {"status": "affected", "version": "6.0", "lessThan": "6.1", "versionType": "semver"}], "platforms": ["Linux"], "packageName": "LXD", "defaultStatus": "unaffected"}]}], "published": "2026-08-12T21:17:39.700", "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-m857-c7gc-c984", "tags": ["Vendor Advisory", "Exploit", "Mitigation"], "source": "security@ubuntu.com"}, {"url": "https://github.com/canonical/lxd/security/advisories/GHSA-m857-c7gc-c984", "tags": ["Vendor Advisory", "Exploit", "Mitigation"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing or restoring a backup archive, LXD fails to validate instance and storage volume names contained within the archive metadata. An attacker can exploit this flaw by supplying a crafted backup archive with malicious instance or volume names containing path traversal sequences, potentially allowing file access or overwriting outside the designated restore directory."}], "lastModified": "2026-09-11T15:30:05.387", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "89DC62EE-69CD-4ACD-BB83-6A0635AC341C", "versionEndExcluding": "4.0.12", "versionStartIncluding": "4.0.0"}, {"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E48F1136-C506-457C-B541-6290724B2070", "versionEndExcluding": "5.0.4", "versionStartIncluding": "5.0.0"}, {"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EF3D3966-CFB4-46B6-8BDA-BE54667A9482", "versionEndExcluding": "5.21.2", "versionStartIncluding": "5.1"}, {"criteria": "cpe:2.3:a:canonical:lxd:6.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3B60D3D1-7BD2-454A-B0CF-CE30B057DD80"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}