Debian LTS: DLA-2606-1: lxml security update
Summary
An issue has been found in lxml, a pythonic binding for the libxml2 and
libxslt libraries.
Due to missing input sanitization, XSS is possible for the HTML5
formaction attribute.
For Debian 9 stretch, this problem has been fixed in version
3.7.1-1+deb9u4.
We recommend that you upgrade your lxml packages.
For the detailed security status of lxml please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/lxml
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS