lxd — security advisory

{
  "id": "a4d08ee2072dd3b98f1ede2e3272ba1ccfa61683d3d95e9e9347d6e3c792dc40",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-66898",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-66898",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2026-66898",
    "products": [
      {
        "name": {
          "value": "lxd",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "5.0.2+git20231211.1364ae4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-8",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-5+deb12u1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-5+deb12u2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-5+deb12u3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-5+deb12u4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-5+deb12u5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-5+deb12u6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.0.2-6",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "lxd",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "5.0.2+git20231211.1364ae4-9",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9+deb13u1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9+deb13u2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9+deb13u3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9+deb13u4",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9+deb13u5",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9+deb13u6",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "5.0.2+git20231211.1364ae4-9+deb13u7",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "DEBIAN-CVE-2026-66898",
      "aliases": [
        "DEBIAN-CVE-2026-66898"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "lxd",
            "purl": "pkg:deb/debian/lxd?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "5.0.2+git20231211.1364ae4-1",
            "5.0.2+git20231211.1364ae4-2",
            "5.0.2+git20231211.1364ae4-3",
            "5.0.2+git20231211.1364ae4-4",
            "5.0.2+git20231211.1364ae4-5",
            "5.0.2+git20231211.1364ae4-6",
            "5.0.2+git20231211.1364ae4-7",
            "5.0.2+git20231211.1364ae4-8",
            "5.0.2+git20231211.1364ae4-9",
            "5.0.2-5",
            "5.0.2-5+deb12u1",
            "5.0.2-5+deb12u2",
            "5.0.2-5+deb12u3",
            "5.0.2-5+deb12u4",
            "5.0.2-5+deb12u5",
            "5.0.2-5+deb12u6",
            "5.0.2-6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-66898.json"
          },
          "ecosystem_specific": {
            "urgency": "end-of-life"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "lxd",
            "purl": "pkg:deb/debian/lxd?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "5.0.2+git20231211.1364ae4-9",
            "5.0.2+git20231211.1364ae4-9+deb13u1",
            "5.0.2+git20231211.1364ae4-9+deb13u2",
            "5.0.2+git20231211.1364ae4-9+deb13u3",
            "5.0.2+git20231211.1364ae4-9+deb13u4",
            "5.0.2+git20231211.1364ae4-9+deb13u5",
            "5.0.2+git20231211.1364ae4-9+deb13u6",
            "5.0.2+git20231211.1364ae4-9+deb13u7"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-66898.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-25T09:47:27.689929352Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-66898"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-66898"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-66898",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 445233,
  "published_at": "2026-08-12T21:17:39.7+00:00"
}