ETK-2026-2854Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2854",
  "cve_id": null,
  "display_id": "ETK-2026-2854",
  "ghsa_id": "GHSA-35mc-3887-rr37",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Heap use-after-free in libheif parallel tile decoding",
  "summary": "libheif 1.23.6 is affected by a heap use-after-free race when decoding crafted HEIF images with derived tiles in parallel. An attacker who can cause an application or service to process an untrusted image may crash the image-processing worker or cause heap corruption; the affected path uses default parallel tile decoding.",
  "mitigation": "Upgrade libheif to version 1.23.7. Until upgrading, disable parallel tile decoding by setting the maximum decoding threads to 0.",
  "vendor": "other",
  "product": "libheif",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "= 1.23.6"
      ],
      "ecosystem": "other",
      "fixed_versions": [
        "1.23.7"
      ],
      "package_name": "libheif",
      "purl": null
    }
  ],
  "cwes": [
    362
  ],
  "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": 39.81396013333333,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-26T11:54:11+00:00",
      "days": -2.1077483130324075,
      "is_lower_bound": true,
      "measured_at": "2026-10-28T14:29:20.483280+00:00",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-35mc-3887-rr37"
    }
  }
}