security update for python-lxml
Description
Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * lxml: lxml-html-clean: lxml: URL bypass vulnerability in Cleaner via missing xlink:href (CVE-2026-49825) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
pkg:deb/ubuntu/lxml?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/lxml?arch=source&distro=esm-infra/xenialpkg:deb/ubuntu/lxml?arch=source&distro=bionicpkg:deb/ubuntu/lxml?arch=source&distro=focalpkg:deb/ubuntu/lxml?arch=source&distro=jammypkg:deb/ubuntu/lxml?arch=source&distro=noblepkg:deb/ubuntu/lxml?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-49825 affects the lxml HTML Cleaner module in python3.12-lxml, where a missing xlink:href attribute check leads to a URL bypass vulnerability. This flaw allows an attacker to bypass URL filtering or cleaning mechanisms in the lxml HTML Cleaner. Red Hat has released updated python3.12-lxml packages for Red Hat Enterprise Linux 9 to fix this issue.
Potential Impact
The vulnerability could allow attackers to bypass URL filtering or cleaning in applications using the lxml HTML Cleaner, potentially leading to unintended processing of malicious URLs. The vendor rates the severity as Important (high). There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated python3.12-lxml packages that fix this vulnerability. Users should apply the official security update for Red Hat Enterprise Linux 9 as described in the Red Hat advisory RHSA-2026:66204. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation is required beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-49825
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6a8c4c58acd9273b499bedcf
Added to database: 08/24/2026, 13:51:20 UTC
Last enriched: 10/02/2026, 18:54:52 UTC
Last updated: 10/08/2026, 21:42:33 UTC
Views: 64
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