Bug 2520368 (CVE-2026-49825) - CVE-2026-49825 lxml: lxml-html-clean: lxml: URL bypass vulnerability in Cleaner via missing xlink:href
Summary: CVE-2026-49825 lxml: lxml-html-clean: lxml: URL bypass vulnerability in Clean...
Keywords:
Status: NEW
Alias: CVE-2026-49825
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2553475 2553476
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-20 15:05 UTC by OSIDB Bzimport
Modified: 2026-10-19 02:32 UTC (History)
88 users (show)

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

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:66203 0 None None None 2026-09-09 21:54:46 UTC
Red Hat Product Errata RHSA-2026:66204 0 None None None 2026-09-09 21:46:43 UTC
Red Hat Product Errata RHSA-2026:67324 0 None None None 2026-09-14 14:52:51 UTC
Red Hat Product Errata RHSA-2026:67325 0 None None None 2026-09-14 14:41:10 UTC
Red Hat Product Errata RHSA-2026:67326 0 None None None 2026-09-14 14:41:34 UTC
Red Hat Product Errata RHSA-2026:67943 0 None None None 2026-09-16 12:16:03 UTC
Red Hat Product Errata RHSA-2026:74081 0 None None None 2026-09-30 19:52:50 UTC
Red Hat Product Errata RHSA-2026:74082 0 None None None 2026-09-30 19:21:50 UTC
Red Hat Product Errata RHSA-2026:74505 0 None None None 2026-10-01 22:13:18 UTC
Red Hat Product Errata RHSA-2026:74506 0 None None None 2026-10-01 22:32:44 UTC
Red Hat Product Errata RHSA-2026:84592 0 None None None 2026-10-19 02:08:11 UTC
Red Hat Product Errata RHSA-2026:84593 0 None None None 2026-10-19 02:32:15 UTC

Description OSIDB Bzimport 2026-08-20 15:05:11 UTC 
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 errata-xmlrpc 2026-09-09 21:46:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:66204 https://access.redhat.com/errata/RHSA-2026:66204
Comment 2 errata-xmlrpc 2026-09-09 21:54:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:66203 https://access.redhat.com/errata/RHSA-2026:66203
Comment 3 Jon Orris 2026-09-14 14:41:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:67325 https://access.redhat.com/errata/RHSA-2026:67325
Comment 4 Jon Orris 2026-09-14 14:41:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:67326 https://access.redhat.com/errata/RHSA-2026:67326
Comment 5 Jon Orris 2026-09-14 14:52:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:67324 https://access.redhat.com/errata/RHSA-2026:67324
Comment 6 Jon Orris 2026-09-16 12:15:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:67943 https://access.redhat.com/errata/RHSA-2026:67943
Comment 7 Jon Orris 2026-09-30 19:21:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:74082 https://access.redhat.com/errata/RHSA-2026:74082
Comment 8 Jon Orris 2026-09-30 19:52:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:74081 https://access.redhat.com/errata/RHSA-2026:74081
Comment 9 Jon Orris 2026-10-01 22:13:14 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.17 for RHEL 9

Via RHSA-2026:74505 https://access.redhat.com/errata/RHSA-2026:74505
Comment 10 Jon Orris 2026-10-01 22:32:40 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.16 for RHEL 8
  Red Hat Satellite 6.16 for RHEL 9

Via RHSA-2026:74506 https://access.redhat.com/errata/RHSA-2026:74506
Comment 11 Jon Orris 2026-10-19 02:08:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:84592 https://access.redhat.com/errata/RHSA-2026:84592
Comment 12 Jon Orris 2026-10-19 02:32:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:84593 https://access.redhat.com/errata/RHSA-2026:84593
Note You need to log in before you can comment on or make changes to this bug.