Cross-site Scripting (XSS) Affecting lxml package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-DEBIAN13-LXML-19215345
- published23 Aug 2026
- disclosed20 Aug 2026
Introduced: 20 Aug 2026
NewCVE-2026-49825 (opens in a new tab)How to fix?
There is no fixed version for Debian:13 lxml.
NVD Description
Note: Versions mentioned in the description apply only to the upstream lxml package and not the lxml package as distributed by Debian.
See How to fix? for Debian:13 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-49825
- https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2
- https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5
- https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0
- https://github.com/lxml/lxml/releases/tag/lxml-6.1.1
- https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739f