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CVE-2026-28350

Estado: AnalizadaMedia (6.1)—

lxml_html_clean is a project for HTML cleaning functionalities copied from `lxml.html.clean`. Prior to version 0.4.4, the <base> tag passes through the default Cleaner configuration. While page_structure=True removes html, head, and title tags, there is no specific handling for <base>, allowing an attacker to inject it and hijack relative links on the page. This issue has been patched in version 0.4.4.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Fedoralovespython — Lxml Html Clean

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-28350",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-28350",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-06T17:05:07.014572Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
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  "affected": [
    {
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      "affectedData": [
        {
          "vendor": "fedora-python",
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              "version": "< 0.4.4"
            }
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  ],
  "published": "2026-03-05T20:16:16.333",
  "references": [
    {
      "url": "https://github.com/fedora-python/lxml_html_clean/commit/9c5612ca33b941eec4178abf8a5294b103403f34",
      "tags": [
        "Patch"
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    },
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        "Vendor Advisory"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-116"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "lxml_html_clean is a project for HTML cleaning functionalities copied from `lxml.html.clean`. Prior to version 0.4.4, the <base> tag passes through the default Cleaner configuration. While page_structure=True removes html, head, and title tags, there is no specific handling for <base>, allowing an attacker to inject it and hijack relative links on the page. This issue has been patched in version 0.4.4."
    },
    {
      "lang": "es",
      "value": "lxml_html_clean es un proyecto para funcionalidades de limpieza de HTML copiadas de 'lxml.html.clean'. Antes de la versión 0.4.4, la etiqueta  pasa a través de la configuración predeterminada de Cleaner. Aunque page_structure=True elimina las etiquetas html, head y title, no hay un manejo específico para , permitiendo a un atacante inyectarla y secuestrar enlaces relativos en la página. Este problema ha sido parcheado en la versión 0.4.4."
    }
  ],
  "lastModified": "2026-06-17T10:28:27.757",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "0.4.4"
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          "operator": "OR"
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  "sourceIdentifier": "security-advisories@github.com"
}