CVE-2026-49825

{
  "id": "CVE-2026-49825",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-20T15:17:30.707",
  "lastModified": "2026-10-26T10:10:00.140",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.1, link attributes in ``lxml.html.defs.link_attrs`` were missing ``xlink:href``, which can be used for URL bypass attacks in embedded SVG/MathML/etc. content. This vulnerability was fixed in lxml 6.1.1 and lxml_html_clean 0.4.5."
    },
    {
      "lang": "es",
      "value": "lxml es una biblioteca para procesar XML y HTML en el lenguaje Python. Antes de la 6.1.1, los atributos de enlace en ’lxml.html.defs.link_attrs’ carecían de ’xlink:href’, que puede ser utilizado para ataques de omisión de URL en contenido SVG/MathML/etc. incrustado. Esta vulnerabilidad fue corregida en lxml 6.1.1 y lxml_html_clean 0.4.5."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "lxml",
          "product": "lxml",
          "versions": [
            {
              "version": "< 6.1.1",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "fedora-python",
          "product": "lxml_html_clean",
          "versions": [
            {
              "version": "< 0.4.5",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-21T16:41:32.043801Z",
          "id": "CVE-2026-49825",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-184"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/lxml/lxml/releases/tag/lxml-6.1.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}