ETK-2026-702Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-702",
  "cve_id": null,
  "display_id": "ETK-2026-702",
  "ghsa_id": "GHSA-6fqc-p7r8-2g36",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "CPU exhaustion in libheif uncompressed image decoding",
  "summary": "libheif versions before 1.23.6 can consume excessive CPU while decoding crafted tiled HEIF images. An attacker can cause a service or application to spend disproportionate processing time if it accepts untrusted images and was built with the uncompressed codec enabled.",
  "mitigation": "Upgrade libheif to version 1.23.6 or later. If an upgrade cannot be applied promptly, disable the uncompressed codec and avoid decoding untrusted HEIF files in affected builds.",
  "vendor": null,
  "product": "libheif",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.19.0, <= 1.23.5"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.23.6"
      ],
      "package_name": null,
      "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": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 36.9498312,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-10-05T16:37:23+00:00",
      "days": -15.766937385949074,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T11:01:46.428169+00:00",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-6fqc-p7r8-2g36"
    },
    "trigger_signal": {
      "at": "2026-10-05T16:37:23+00:00",
      "days": -15.766937385949074,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T11:01:46.428169+00:00",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-6fqc-p7r8-2g36"
    }
  }
}