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Published: 13 December 2021

lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.



CVSS 3 base score: 7.1


Package Release Status
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.10 (Impish Indri)
Released (4.6.3+dfsg-0.1ubuntu0.2)
Ubuntu 21.04 (Hirsute Hippo)
Released (4.6.3-1ubuntu0.2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (4.5.0-1ubuntu0.5)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.2.1-1ubuntu0.6)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (3.5.0-1ubuntu0.4+esm2)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.3.3-1ubuntu0.2+esm5)