Bug 2553476 - CVE-2026-49825 python-lxml: lxml: URL bypass vulnerability in Cleaner via missing xlink:href [fedora-all]
Summary: CVE-2026-49825 python-lxml: lxml: URL bypass vulnerability in Cleaner via mis...
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora
Classification: Fedora
Component: python-lxml
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Python Maintainers
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["06228d28-a757-4837-a927-d...
Depends On:
Blocks: CVE-2026-49825
TreeView+ depends on / blocked
 
Reported: 2026-10-15 14:37 UTC by Siddharth Sharma
Modified: 2026-10-15 15:14 UTC (History)
8 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-10-15 15:14:41 UTC
Type: ---
Embargoed:

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Description Siddharth Sharma 2026-10-15 14:37:57 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.
Comment 1 Miro Hrončok 2026-10-15 15:14:41 UTC 
"""This vulnerability was fixed in lxml 6.1.1 and lxml_html_clean 0.4.5."""
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