CVE-2026-28348

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Source
https://cve.org/CVERecord?id=CVE-2026-28348
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28348.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-28348
Aliases
Downstream
Related
Published
2026-03-05T19:49:26.385Z
Modified
2026-03-14T12:47:50.951423Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
lxml_html_clean: CSS @import Filter Bypass via Unicode Escapes
Details

lxmlhtmlclean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the hassneaky_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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-116"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28348.json"
}
References

Affected packages

Git / github.com/fedora-python/lxml_html_clean

Affected ranges

Type
GIT
Repo
https://github.com/fedora-python/lxml_html_clean
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
fd10d79cf8a4d4a962e139aee6d02dec02b2de7c

Affected versions

0.*
0.1.0
0.1.1
0.2.0
0.2.1
0.2.2
0.3.0
0.3.1
0.4.0
0.4.1
0.4.2
0.4.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28348.json"