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CVE-2026-49825 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f	CISA-ADP
https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2	[email protected]
https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5	[email protected]
https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f	[email protected]
https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0	[email protected]
https://github.com/lxml/lxml/releases/tag/lxml-6.1.1	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-184	Incomplete List of Disallowed Inputs	[email protected]
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Aug 21, 2026	CVE Modified	CISA-ADP
Aug 20, 2026	New CVE Received	[email protected]