OPENSUSE-SU-2026:20345-1

Vulnerability from csaf_opensuse - Published: 2026-03-11 18:05 - Updated: 2026-03-11 18:05
Summary
Security update for python-lxml_html_clean

Notes

Title of the patch
Security update for python-lxml_html_clean
Description of the patch
This update for python-lxml_html_clean fixes the following issues: Changes in python-lxml_html_clean: - CVE-2026-28348: improper keywords checking can allow external CSS loading (bsc#1259378) - CVE-2026-28350: lack of base tag handling can allow the hijacking of the resolution of relative URLs (bsc#1259379)
Patchnames
openSUSE-Leap-16.0-packagehub-157
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
To clipboard 

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      ],
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        {
          "category": "general",
          "text": "lxml_html_clean is a project for HTML cleaning functionalities copied from `lxml.html.clean`. Prior to version 0.4.4, the _has_sneaky_javascript() method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression() filters, allowing external CSS loading or XSS in older browsers. This issue has been patched in version 0.4.4.",
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          "text": "lxml_html_clean is a project for HTML cleaning functionalities copied from `lxml.html.clean`. Prior to version 0.4.4, the \u003cbase\u003e tag passes through the default Cleaner configuration. While page_structure=True removes html, head, and title tags, there is no specific handling for \u003cbase\u003e, allowing an attacker to inject it and hijack relative links on the page. This issue has been patched in version 0.4.4.",
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.