ETK-2026-3756Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3756",
  "cve_id": null,
  "display_id": "ETK-2026-3756",
  "ghsa_id": "GHSA-fmc8-p6q7-75cc",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Argument injection in LXD backup compression",
  "summary": "LXD versions before 0.0.0-20260630083100-c5184be310b1 may pass unvalidated extra options from backup compression settings to a host-side compression utility. An authenticated user permitted to create backups and control that setting could write files on the host and potentially execute commands.",
  "mitigation": "Upgrade github.com/canonical/lxd to 0.0.0-20260630083100-c5184be310b1 or later. Until upgraded, restrict backup creation and access to backup compression settings to trusted administrators.",
  "vendor": "go",
  "product": "go:github.com/canonical/lxd",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 0.0.0-20260630083100-c5184be310b1"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "0.0.0-20260630083100-c5184be310b1"
      ],
      "package_name": "github.com/canonical/lxd",
      "purl": "pkg:golang/github.com/canonical/lxd"
    }
  ],
  "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": 48.01149528333333,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-11-06T19:36:37+00:00",
      "days": -1.2088713441203705,
      "is_lower_bound": true,
      "measured_at": "2026-11-08T00:37:23.521766+00:00",
      "url": "https://github.com/advisories/GHSA-fmc8-p6q7-75cc"
    },
    "trigger_signal": {
      "at": "2026-11-06T19:36:37+00:00",
      "days": -1.2088713441203705,
      "is_lower_bound": true,
      "measured_at": "2026-11-08T00:37:23.521766+00:00",
      "url": "https://github.com/advisories/GHSA-fmc8-p6q7-75cc"
    }
  }
}