ETK-2026-2719Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2719",
  "cve_id": null,
  "display_id": "ETK-2026-2719",
  "ghsa_id": "GHSA-73j7-gvm9-x8q6",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "CPU denial of service in libheif sequence decoding",
  "summary": "libheif 1.21.0 through 1.23.6 can spend excessive CPU time while decoding crafted HEIF image sequences. An attacker who can supply a sequence to an application using sequence decoding may exhaust decoder or worker CPU resources, even when the application only requests an initial frame.",
  "mitigation": "Upgrade libheif to version 1.23.7 or later. Until upgrading, avoid processing untrusted HEIF image sequences through the sequence-decoding interface.",
  "vendor": "other",
  "product": "libheif",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.21.0, < 1.23.7"
      ],
      "ecosystem": "other",
      "fixed_versions": [
        "1.23.7"
      ],
      "package_name": "libheif",
      "purl": null
    }
  ],
  "cwes": [
    834
  ],
  "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": 15.552118116666668,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-26T11:52:15+00:00",
      "days": -0.8060369665046296,
      "is_lower_bound": true,
      "measured_at": "2026-10-27T07:12:56.676772+00:00",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-73j7-gvm9-x8q6"
    }
  }
}