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CVE-2026-28348

PoC —
CVSS 3.1
6.1 medium
EPSS
<1%p14
Published
()
Modified
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.

Vendors
fedoralovespython
Products
lxml html clean
Weakness
CWE-116
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD CVE.org GitHub PoCs EPSS (0.2%)

In the news

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