CVE Catalog

CVE-2026-49825

HighCVSS 8.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.24%

15th percentile - higher than 15% of all known CVEs

Summary

The lxml library prior to 6.1.1 was missing the xlink:href attribute in lxml.html.defs.link_attrs, which can be used for URL bypass attacks in embedded SVG/MathML content. This vulnerability was fixed in lxml 6.1.1 and lxml_html_clean 0.4.5.

Risk Assessment

An attacker can exploit this flaw to bypass URL filters and conduct phishing attacks or inject malicious content.

Recommendation

Update lxml to version 6.1.1 or later and lxml_html_clean to 0.4.5 or later.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS