ETK-2026-2720Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2720",
  "cve_id": null,
  "display_id": "ETK-2026-2720",
  "ghsa_id": "GHSA-2g6j-vhr6-6wrj",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "CPU exhaustion denial of service in libheif decoding",
  "summary": "libheif versions before 1.23.7 can spend excessive CPU time decoding a crafted HEIF image or sequence sample containing many coded pictures. An attacker can tie up decoding workers when an application processes attacker-controlled HEIF files, such as uploads or thumbnails.",
  "mitigation": "Upgrade libheif to version 1.23.7 or later. Until upgrades are complete, restrict or isolate processing of untrusted HEIF files and apply decoding time limits where possible.",
  "vendor": "other",
  "product": "libheif",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.0.0, < 1.23.7"
      ],
      "ecosystem": "other",
      "fixed_versions": [
        "1.23.7"
      ],
      "package_name": "libheif",
      "purl": null
    }
  ],
  "cwes": [
    405
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 45.24626315,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-26T11:52:58+00:00",
      "days": -0.8328858386226852,
      "is_lower_bound": true,
      "measured_at": "2026-10-27T07:52:19.429862+00:00",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-2g6j-vhr6-6wrj"
    }
  }
}