CVE-2026-49825: fallo de gravedad alta en lxml
lxml: javascript: URL bypass in Cleaner via xlink:href
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.2epss 0.3%
lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.1, link attributes in ``lxml.html.defs.link_attrs`` were missing ``xlink:href``, which can be used for URL bypass attacks in embedded SVG/MathML/etc. content. This vulnerability was fixed in lxml 6.1.1 and lxml_html_clean 0.4.5.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
CVEs relacionadas — lxml
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CVE-2021-43818HIGHHTML Cleaner allows crafted and SVG embedded scripts to pass throughEPSS 2.7%CVE-2024-52595HIGHHTML Cleaner allows crafted scripts in special contexts like svg or math to pass throughEPSS 0.5%CVE-2026-41066HIGHlxml: Default configuration of iterparse() and ETCompatXMLParser() allows XXE to local filesEPSS 0.3%CVE-2026-28350MEDIUMlxml_html_clean: <base> tag injection through default Cleaner configurationEPSS 0.3%CVE-2026-28348MEDIUMlxml_html_clean: CSS @import Filter Bypass via Unicode EscapesEPSS 0.3%
Referencias
https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53b4e92e31f3ded9f2https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-jv67-739fhttps://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0https://github.com/lxml/lxml/releases/tag/lxml-6.1.1