{"cve":"CVE-2026-28350","nvd":{"published":"2026-03-05T20:16:16.333","modified":"2026-06-17T10:28:27.757","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-116"],"references":["https://github.com/fedora-python/lxml_html_clean/commit/9c5612ca33b941eec4178abf8a5294b103403f34","https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-xvp8-3mhv-424c","https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-xvp8-3mhv-424c"],"products":["fedoralovespython:lxml_html_clean"],"source":"nvd","synced_at":"2026-10-19T22:25:53.701907451+00:00"},"epss":{"cve":"CVE-2026-28350","score":0.00296,"percentile":0.22259,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-xvp8-3mhv-424c","url":"https://osv.dev/vulnerability/GHSA-xvp8-3mhv-424c","summary":"lxml-html-clean has <base> tag injection through default Cleaner configuration","modified":"2026-09-10T03:50:41.927155700Z","packages":[{"ecosystem":"PyPI","name":"lxml-html-clean","purl":"pkg:pypi/lxml-html-clean","ranges":["<0.4.4"],"fixed":["0.4.4"]}]},{"id":"PYSEC-2026-2202","url":"https://osv.dev/vulnerability/PYSEC-2026-2202","summary":"","modified":"2026-07-13T07:15:27.778054869Z","packages":[{"ecosystem":"PyPI","name":"lxml-html-clean","purl":"pkg:pypi/lxml-html-clean","ranges":["<0.4.4"],"fixed":["0.4.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}