Improper Encoding or Escaping of Output Affecting lxml package, versions <5.2.0-1
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.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-LXML-17376624
- published19 Jun 2026
- disclosed5 Mar 2026
Introduced: 5 Mar 2026
CVE-2026-28350 (opens in a new tab)How to fix?
Upgrade Debian:unstable lxml to version 5.2.0-1 or higher.
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:unstable relevant fixed versions and status.
lxml_html_clean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the <base> tag passes through the default Cleaner configuration. While page_structure=True removes html, head, and title tags, there is no specific handling for <base>, allowing an attacker to inject it and hijack relative links on the page. This issue has been patched in version 0.4.4.