{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49825", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-01T18:50:36.055Z", "datePublished": "2026-08-20T14:42:30.748Z", "dateUpdated": "2026-08-20T14:42:30.748Z"}, "containers": {"cna": {"title": "lxml: javascript: URL bypass in Cleaner via xlink:href", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-184", "lang": "en", "description": "CWE-184: Incomplete List of Disallowed Inputs", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f"}, {"name": "https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2", "tags": ["x_refsource_MISC"], "url": "https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2"}, {"name": "https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0", "tags": ["x_refsource_MISC"], "url": "https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0"}, {"name": "https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5"}, {"name": "https://github.com/lxml/lxml/releases/tag/lxml-6.1.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/lxml/lxml/releases/tag/lxml-6.1.1"}], "affected": [{"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"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-20T14:42:30.748Z"}, "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."}], "source": {"advisory": "GHSA-4jhm-jv67-739f", "discovery": "UNKNOWN"}}}}

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{"affected": [{"affectedData": [{"product": "lxml", "vendor": "lxml", "versions": [{"status": "affected", "version": "< 6.1.1"}]}, {"product": "lxml_html_clean", "vendor": "fedora-python", "versions": [{"status": "affected", "version": "< 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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