CVE-2026-28350 — MEDIUM (6.1)

Vulnerability Description

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.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Fedoralovespython	Lxml Html Clean	< 0.4.4

Related Weaknesses (CWE)

CWE-116

References

https://github.com/fedora-python/lxml_html_clean/commit/9c5612ca33b941eec4178abfPatch
https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-xvp8-3ExploitVendor Advisory
https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-xvp8-3ExploitVendor Advisory

FAQ

What is CVE-2026-28350?

CVE-2026-28350 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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_struct...

How severe is CVE-2026-28350?

CVE-2026-28350 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-28350?

Check the references section above for vendor advisories and patch information. Affected products include: Fedoralovespython Lxml Html Clean.