Incomplete List of Disallowed Inputs Affecting lxml-html-clean package, versions [,0.4.5)
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-PYTHON-LXMLHTMLCLEAN-17911675
- published9 Jul 2026
- disclosed8 Jul 2026
- creditglefait
Introduced: 8 Jul 2026
CVE-2026-49825 (opens in a new tab)How to fix?
Upgrade lxml-html-clean to version 0.4.5 or higher.
Overview
lxml-html-clean is a HTML cleaner from lxml project
Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs in the Cleaner process when handling namespaced URL attributes such as xlink:href with the safe_attrs_only=False configuration. An attacker can execute arbitrary JavaScript in the context of the victim's browser by injecting payloads containing javascript: URLs in SVG or MathML elements, which are not properly sanitized. This is only exploitable if the safe_attrs_only option is explicitly set to False.