What is the CVSS score of CVE-2026-28348?

CVE-2026-28348 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Lxml Html Clean are affected by CVE-2026-28348?

Organizations using lxml_html_clean should be aware of moderate risk from CVE-2026-28348 rated CVSS 6.1. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-28348?

Yes, a public proof-of-concept exploit is available for CVE-2026-28348. Prioritise patching immediately. EPSS: 0.0%.

Lxml Html Clean CVE-2026-28348

MEDIUM

Improper Encoding or Escaping of Output (CWE-116)

2026-03-05 security-advisories@github.com

GHSA-hw26-mmpg-fqfg

XSS Lxml Html Clean Suse

6.1

CVSS 3.1

CVSS VectorNVD

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

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

PoC Detected

Mar 09, 2026 - 20:55 vuln.today

Public exploit code

Patch released

Mar 09, 2026 - 20:55 nvd

Patch available

CVE Published

Mar 05, 2026 - 20:16 nvd

MEDIUM 6.1

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

154 pypi packages depend on lxml-html-clean (24 direct, 132 indirect)

Ecosystem-wide dependent count for version 0.4.4.

DescriptionNVD

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.

AnalysisAI

lxml_html_clean versions before 0.4.4 fail to properly sanitize CSS Unicode escape sequences in the _has_sneaky_javascript() method, allowing attackers to bypass filters and inject malicious @import statements or XSS payloads. Public exploit code exists for this vulnerability, which affects applications using the library for HTML sanitization. …

RemediationAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

More from same product – last 7 days

CVE-2026-9256 HIGH This Week

8.1 May 22

Heap buffer overflow in NGINX Plus and NGINX Open Source ngx_http_rewrite_module allows unauthenticated remote attackers

Vendor StatusVendor

CVE-2026-28348 vulnerability details – vuln.today

Back