CVE-2026-28348

Published March 5th, 2026

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CVSS v3

6.1

MEDIUM

CVSS v2

N/A

Affected

PROJECT

Description

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.

fedora-python/lxml_html_clean

Separate project for HTML cleaning functionalities copied from lxml.html.clean.

GitHub