Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53
- https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5
- https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-j
- https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0
- https://github.com/lxml/lxml/releases/tag/lxml-6.1.1
- https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-j
FAQ
What is CVE-2026-49825?
CVE-2026-49825 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 att...
How severe is CVE-2026-49825?
CVE-2026-49825 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49825?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.