{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28350","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-02-26T18:38:13.890Z","datePublished":"2026-03-05T19:49:55.662Z","dateUpdated":"2026-03-06T17:05:13.841Z"},"containers":{"cna":{"title":"lxml_html_clean: <base> tag injection through default Cleaner configuration","problemTypes":[{"descriptions":[{"cweId":"CWE-116","lang":"en","description":"CWE-116: Improper Encoding or Escaping of Output","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-xvp8-3mhv-424c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-xvp8-3mhv-424c"},{"name":"https://github.com/fedora-python/lxml_html_clean/commit/9c5612ca33b941eec4178abf8a5294b103403f34","tags":["x_refsource_MISC"],"url":"https://github.com/fedora-python/lxml_html_clean/commit/9c5612ca33b941eec4178abf8a5294b103403f34"}],"affected":[{"vendor":"fedora-python","product":"lxml_html_clean","versions":[{"version":"< 0.4.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-05T19:49:55.662Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-xvp8-3mhv-424c","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-xvp8-3mhv-424c","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-06T17:05:07.014572Z","id":"CVE-2026-28350","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-06T17:05:13.841Z"}}]}}