How severe is CVE-2026-28350?

CVE-2026-28350 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-28350 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28350?

CVE-2026-28350 affects Fedoralovespython Lxml Html Clean. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28350?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-28350 have an EU (EUVD) identifier?

Yes. CVE-2026-28350 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20098.

When was CVE-2026-28350 published?

CVE-2026-28350 was published on 2026-03-05 and last updated on 2026-06-17.

CVE-2026-28350

CVE-2026-28350 is a medium-severity vulnerability in Fedoralovespython Lxml Html Clean with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-116.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20098
Weakness: CWE-116
Affected product: Fedoralovespython Lxml Html Clean
Published: 2026-03-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-28350?: 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.
How severe is CVE-2026-28350?: CVE-2026-28350 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-28350 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28350?: CVE-2026-28350 affects Fedoralovespython Lxml Html Clean. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28350?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-28350 have an EU (EUVD) identifier?: Yes. CVE-2026-28350 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20098.
When was CVE-2026-28350 published?: CVE-2026-28350 was published on 2026-03-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fedoralovespython:lxml_html_clean:*:*:*:*:*:python:*:*

More vulnerabilities in Fedoralovespython Lxml Html Clean

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