CVE-2026-104020

{
  "etk_id": "ETK-2026-287",
  "cve_id": "CVE-2026-104020",
  "display_id": "CVE-2026-104020",
  "ghsa_id": "GHSA-93q6-f8hx-vv7f",
  "euvd_id": "EUVD-2026-91059",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Uncontrolled recursion denial of service in ion-python",
  "summary": "Amazon ion-python versions before 0.15.0 are affected by uncontrolled recursion while reading deeply nested Ion values. A remote unauthenticated attacker may cause an application using the library to crash if it processes attacker-supplied Ion data, resulting in denial of service.",
  "mitigation": "Upgrade ion-python to version 0.15.0 or later. Until upgraded, limit or reject untrusted deeply nested Ion input where possible.",
  "vendor": "Amazon",
  "product": "ion-python",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 0.15.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "0.15.0"
      ],
      "package_name": "ion-python",
      "purl": null
    }
  ],
  "cwes": [
    674
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0044,
  "epss_percentile": 0.3697,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 14.41610605,
  "t0_at": "2026-10-01T20:36:33.967000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-01T20:36:33.967000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-01T20:36:33.967000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-104020"
    }
  }
}