CVE-2026-49825
Published:August 20, 2026
Updated:September 24, 2026
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.
Affected Packages
lxml_html_clean (PYTHON):
Affected version(s) >=0.1.0 <0.4.5Fix Suggestion:
Update to version 0.4.5Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (10)
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Contact UsCVSS v4
Base Score:
8.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.24