ETK-2026-2664Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2664",
  "cve_id": null,
  "display_id": "ETK-2026-2664",
  "ghsa_id": "GHSA-hm48-5chc-q85f",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Quadratic-time denial of service in lxml_html_clean",
  "summary": "lxml_html_clean through version 0.4.5 can use disproportionate CPU while Cleaner.clean_html() processes crafted HTML and CSS. An attacker who can supply content for cleaning may cause request slowdown or denial of service; the conditional-comment path additionally requires a Cleaner configuration with comments=False.",
  "mitigation": "Upgrade lxml_html_clean to version 0.4.6 or later. Until upgraded, restrict untrusted HTML input sizes and apply processing time or resource limits around cleaning.",
  "vendor": "pip",
  "product": "pip:lxml_html_clean",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 0.4.5"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.4.6"
      ],
      "package_name": "lxml_html_clean",
      "purl": "pkg:pypi/lxml_html_clean"
    }
  ],
  "cwes": [
    1333
  ],
  "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": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 15.821909133333333,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-26T17:06:28.427875+00:00",
      "days": -0.17855012144675925,
      "is_lower_bound": true,
      "measured_at": "2026-10-26T21:23:35.195964+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-26T11:15:18+00:00",
      "days": -0.42242081444444446,
      "is_lower_bound": true,
      "measured_at": "2026-10-26T21:23:35.195964+00:00",
      "url": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-hm48-5chc-q85f"
    }
  }
}