CVE-2026-87799

{
  "etk_id": "ETK-2026-3104",
  "cve_id": "CVE-2026-87799",
  "display_id": "CVE-2026-87799",
  "ghsa_id": "GHSA-fmc3-3cpq-6whr",
  "euvd_id": "EUVD-2026-88260",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Improper symlink resolution in LXD migration receive",
  "summary": "Canonical LXD migration receiving is affected by improper resolution of links in transferred instance or custom-volume data. An authenticated client permitted to create project resources, or an untrusted migration source, can cause attacker-selected files to be written on the target host with root privileges. Exposure requires accepting migrations or resource creation from such a principal.",
  "mitigation": "Upgrade LXD to 4.0.14, 5.0.10, 5.21.8, 6.9-bf243da, 6.10, or a later applicable release. Until upgraded, permit instance and custom-volume creation and migration only from trusted clients and source servers.",
  "vendor": "canonical",
  "product": "LXD",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "4.0.14",
        "5.0.10",
        "5.21.8",
        "6.9-bf243da",
        "6.10"
      ],
      "package_name": "lxd",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 9.9,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 23.015727766666668,
  "t0_at": "2026-09-28T13:22:29.148000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-28T13:22:29.148000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-28T13:22:29.148000+00:00",
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-fmc3-3cpq-6whr"
    }
  }
}