High8.2Red Hat Linux

High [CVE-2026-49825] URL bypass vulnerability in Cleaner via missing xlink:href

This high-severity Red Hat Linux advisory covers CVE-2026-49825 affecting Lightspeed Core, Migration Toolkit for Applications 8, Red Hat AI Inference Server.

CVE-2026-49825 Published Aug 20, 2026Updated by vendor Aug 20, 2026

CVE-2026-49825

Affected products & platforms

Red Hat LinuxRed Hat Enterprise Linux

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Summary

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. This vulnerability enables URL bypass attacks in embedded content such as Scalable Vector Graphics (SVG) or Mathematical Markup Language (MathML), potentially leading to information disclosure or arbitrary code execution in the context of the user's browser.

Red Hat severity: Important — CVSS 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N). Weakness: CWE-166.

Affected products named by the advisory: Lightspeed Core; Migration Toolkit for Applications 8; Red Hat AI Inference Server; Red Hat Ansible Automation Platform 2; and 20 more.

Affected versions

< 6.1.1

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Fixed versions

6.1.1
0.4.5

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Mitigation

Upgrade to a fixed release: 6.1.1, 0.4.5. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

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