{"id":"UBUNTU-CVE-2026-49825","details":"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.","modified":"2026-09-02T19:36:23.485402456Z","published":"2026-08-20T15:17:00Z","upstream":["CVE-2026-49825"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-49825"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-49825"}],"affected":[{"package":{"name":"lxml","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/lxml?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0-1","3.3.0~beta2-1","3.3.0~beta4-1","3.3.1-1","3.3.2-1","3.3.2-1build1","3.3.3-1","3.3.3-1ubuntu0.1","3.3.3-1ubuntu0.2","3.3.3-1ubuntu0.2+esm1","3.3.3-1ubuntu0.2+esm2","3.3.3-1ubuntu0.2+esm3","3.3.3-1ubuntu0.2+esm5"],"ecosystem_specific":{"binaries":[{"binary_version":"3.3.3-1ubuntu0.2+esm5","binary_name":"python-lxml"},{"binary_version":"3.3.3-1ubuntu0.2+esm5","binary_name":"python3-lxml"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49825.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/lxml?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.4-1","3.5.0-1","3.5.0-1build1","3.5.0-1ubuntu0.1","3.5.0-1ubuntu0.2","3.5.0-1ubuntu0.3","3.5.0-1ubuntu0.4","3.5.0-1ubuntu0.4+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"python-lxml","binary_version":"3.5.0-1ubuntu0.4+esm2"},{"binary_name":"python3-lxml","binary_version":"3.5.0-1ubuntu0.4+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49825.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/lxml?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.0-1","4.1.0-1","4.2.0-1","4.2.1-1","4.2.1-1ubuntu0.1","4.2.1-1ubuntu0.2","4.2.1-1ubuntu0.3","4.2.1-1ubuntu0.4","4.2.1-1ubuntu0.6"],"ecosystem_specific":{"binaries":[{"binary_version":"4.2.1-1ubuntu0.6","binary_name":"python-lxml"},{"binary_version":"4.2.1-1ubuntu0.6","binary_name":"python3-lxml"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49825.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/lxml?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.1-1","4.4.1-1build1","4.4.2-1","4.5.0-1","4.5.0-1ubuntu0.1","4.5.0-1ubuntu0.2","4.5.0-1ubuntu0.3","4.5.0-1ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_version":"4.5.0-1ubuntu0.5","binary_name":"python-lxml"},{"binary_version":"4.5.0-1ubuntu0.5","binary_name":"python3-lxml"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49825.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/lxml?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.6.3+dfsg-0.1","4.6.4-1","4.6.4-1ubuntu1","4.7.1-1","4.8.0-1","4.8.0-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.8.0-1build1","binary_name":"python3-lxml"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49825.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/lxml?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.3-1","4.9.3-1build1","4.9.4-1","5.1.0-1","5.1.0-1build1","5.1.0-1build2","5.2.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2.1-1","binary_name":"python3-lxml"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49825.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/lxml?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.1-1","6.0.1-1build1","6.0.2-1","6.0.2-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-lxml","binary_version":"6.0.2-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49825.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}