FKIE_CVE-2026-49825

Vulnerability from fkie_nvd - Published: 2026-08-20 15:17 - Updated: 2026-08-20 15:17
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2
security-advisories@github.comhttps://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5
security-advisories@github.comhttps://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f
security-advisories@github.comhttps://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0
security-advisories@github.comhttps://github.com/lxml/lxml/releases/tag/lxml-6.1.1
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "lxml",
          "vendor": "lxml",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.1.1"
            }
          ]
        },
        {
          "product": "lxml_html_clean",
          "vendor": "fedora-python",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.4.5"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "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."
    }
  ],
  "id": "CVE-2026-49825",
  "lastModified": "2026-08-20T15:17:30.707",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-20T15:17:30.707",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lxml/lxml/releases/tag/lxml-6.1.1"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-184"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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