CVE-2026-126190

{
  "etk_id": "ETK-2026-4293",
  "cve_id": "CVE-2026-126190",
  "display_id": "CVE-2026-126190",
  "ghsa_id": "GHSA-mmhr-3c5m-f64f",
  "euvd_id": "EUVD-2026-124549",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Polynomial denial of service in soupsieve selector matching",
  "summary": "soupsieve versions before 4.0 can consume excessive CPU while matching descendant CSS selectors against deeply nested untrusted HTML or XML. An attacker may tie up a worker if an application applies affected selectors through soupsieve or Beautiful Soup selector APIs; trusted-document workflows are not implicated.",
  "mitigation": "Upgrade soupsieve to version 4.0. Avoid compiling selectors with NOCACHE when they will process untrusted documents.",
  "vendor": "facelessuser",
  "product": "soupsieve",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 4.0"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "4.0"
      ],
      "package_name": "soupsieve",
      "purl": "pkg:pypi/soupsieve"
    }
  ],
  "cwes": [
    407
  ],
  "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": 12.86995045,
  "t0_at": "2026-11-12T16:54:14.644000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-12T16:54:14.644000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-12T16:54:14.644000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-126190"
    }
  }
}