Bug 2553475 - CVE-2026-49825 mingw-python-lxml: lxml: URL bypass vulnerability in Cleaner via missing xlink:href [fedora-all]
Summary: CVE-2026-49825 mingw-python-lxml: lxml: URL bypass vulnerability in Cleaner v...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora
Classification: Fedora
Component: mingw-python-lxml
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Sandro Mani
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 14:36 UTC by Siddharth Sharma
Modified: 2026-10-18 02:46 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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Description Siddharth Sharma 2026-10-15 14:36:43 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 Fedora Update System 2026-10-17 09:24:07 UTC 
FEDORA-2026-99cd0bee1c (mingw-python-lxml-6.1.1-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-99cd0bee1c
Comment 2 Fedora Update System 2026-10-18 02:46:21 UTC 
FEDORA-2026-99cd0bee1c has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-99cd0bee1c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-99cd0bee1c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
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