FKIE_CVE-2026-28348

Vulnerability from fkie_nvd - Published: 2026-03-05 20:16 - Updated: 2026-03-09 20:55
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
lxml_html_clean is a project for HTML cleaning functionalities copied from `lxml.html.clean`. Prior to version 0.4.4, the _has_sneaky_javascript() method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression() filters, allowing external CSS loading or XSS in older browsers. This issue has been patched in version 0.4.4.
References
security-advisories@github.comhttps://github.com/fedora-python/lxml_html_clean/commit/2ef732667ddbc74ea59847bcf24b75809aaeed3bPatch
security-advisories@github.comhttps://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-hw26-mmpg-fqfgExploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-hw26-mmpg-fqfgExploit, Vendor Advisory
Impacted products
Vendor Product Version
fedoralovespython lxml_html_clean *
To clipboard 

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  "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 _has_sneaky_javascript() method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression() filters, allowing external CSS loading or XSS in older browsers. This issue has been patched in version 0.4.4."
    },
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      "value": "lxml_html_clean es un proyecto para funcionalidades de limpieza de HTML copiado de \u0027lxml.html.clean\u0027. Antes de la versi\u00f3n 0.4.4, el m\u00e9todo _has_sneaky_javascript() elimina las barras invertidas antes de verificar palabras clave CSS peligrosas. Esto provoca que las secuencias de escape Unicode de CSS omitan los filtros @import y expression(), permitiendo la carga externa de CSS o XSS en navegadores antiguos. Este problema ha sido parcheado en la versi\u00f3n 0.4.4."
    }
  ],
  "id": "CVE-2026-28348",
  "lastModified": "2026-03-09T20:55:16.367",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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  "published": "2026-03-05T20:16:16.180",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-116"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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