CVE-2026-84447

{
  "etk_id": "ETK-2026-521",
  "cve_id": "CVE-2026-84447",
  "display_id": "CVE-2026-84447",
  "ghsa_id": "GHSA-x8xm-cm2c-cfc8",
  "euvd_id": "EUVD-2026-83023",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Resource exhaustion in strukturag libheif image decoding",
  "summary": "strukturag libheif before 1.23.2 can repeatedly decode a referenced base image when processing crafted HEIF or AVIF derived-image reference graphs. An unauthenticated attacker who can supply a file for decoding can consume excessive CPU resources; builds with experimental tiled-image support may also be exposed to excessive memory allocation.",
  "mitigation": "Upgrade strukturag libheif to version 1.23.2 or later. Until the upgrade is deployed, restrict decoding of untrusted HEIF/AVIF files and disable experimental tiled-image support where it is enabled.",
  "vendor": "strukturag",
  "product": "libheif",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 1.23.1"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.23.2"
      ],
      "package_name": null,
      "purl": null
    }
  ],
  "cwes": [
    770
  ],
  "cvss_score": 7.5,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": 0.0052,
  "epss_percentile": 0.4286,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 23.98673021666667,
  "t0_at": "2026-09-18T16:00:51.589000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-18T16:00:51.589000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-18T16:00:51.589000+00:00",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8"
    }
  }
}