ETK-2026-1938Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-1938",
  "cve_id": null,
  "display_id": "ETK-2026-1938",
  "ghsa_id": "GHSA-78g4-xqwv-q3g8",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Heap buffer overflow in Pillow's bundled OpenJPEG decoder",
  "summary": "Pillow versions before 13.0.0 bundle an affected OpenJPEG decoder in their binary wheels. An attacker who can cause an application to load a crafted image may corrupt memory and crash the process; exposure requires the application to process untrusted images through Pillow, including inputs whose file name or declared type disguises their actual format.",
  "mitigation": "Upgrade Pillow to version 13.0.0 or later. Until upgrades are complete, reject untrusted image formats except an explicit allowlist enforced during decoding, and isolate image-processing workers.",
  "vendor": "pip",
  "product": "Pillow",
  "affected": [
    {
      "affected_notes": [
        "11.1.0 - 12.3.0"
      ],
      "affected_ranges": [],
      "ecosystem": "pip",
      "fixed_versions": [
        "13.0.0"
      ],
      "package_name": "pillow",
      "purl": "pkg:pypi/pillow"
    }
  ],
  "cwes": [
    787
  ],
  "cvss_score": 8.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 43.648042933333336,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-18T06:41:59.496685+00:00",
      "days": -3.628198528761574,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T21:46:36.011223+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-17T10:33:53+00:00",
      "days": -4.467162610763889,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T21:46:36.011223+00:00",
      "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-78g4-xqwv-q3g8"
    }
  }
}