{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.0.8"
              },
              {
                "introduced": "5.21.0"
              },
              {
                "fixed": "5.21.6"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "1e1349e3cbf30c1b2ce74e531d4dd0fd52c45be1"
            },
            {
              "fixed": "58b58151cfc3bd9fb0fedce26fcdd73a3e67bdb8"
            },
            {
              "introduced": "761d134ceabd306f57acfb0ca51f59b03751a5b0"
            },
            {
              "fixed": "c6146714d0cacd04b77598bac149f5db714834f6"
            }
          ],
          "repo": "https://github.com/canonical/lxd",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-5g5r-wh97-qcq2"
  ],
  "database_specific": {
    "cna_assigner": "canonical",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63300.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "6.0"
          },
          {
            "fixed": "6.10"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "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",
  "modified": "2026-08-15T11:30:51.299341797Z",
  "published": "2026-08-12T19:09:04.445Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63300.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63300"
    },
    {
      "type": "FIX",
      "url": "https://github.com/canonical/lxd/pull/18605"
    },
    {
      "type": "FIX",
      "url": "https://github.com/canonical/lxd/pull/18651"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/canonical/lxd"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cross-project instance move bypasses all project restrictions allowing host command execution"
}