A python-lxml security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: python-lxml-4.6.3-1.fc34

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Fedora Update Notification
FEDORA-2021-28723f9670
2021-05-28 00:59:13.836741
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Name : python-lxml
Product : Fedora 34
Version : 4.6.3
Release : 1.fc34
URL :   https://github.com/lxml/lxml
Summary : XML processing library combining libxml2/libxslt with the ElementTree API
Description :
lxml is a Pythonic, mature binding for the libxml2 and libxslt libraries. It
provides safe and convenient access to these libraries using the ElementTree It
extends the ElementTree API significantly to offer support for XPath, RelaxNG,
XML Schema, XSLT, C14N and much more.To contact the project, go to the project
home page < or see our bug tracker at case you want to use the current ...

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Update Information:

Rebase to version 4.6.3. Fix CVE-2021-28957: missing input sanitization for
formaction HTML5 attributes may lead to XSS
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ChangeLog:

* Thu May 20 2021 Charalampos Stratakis - 4.6.3-1
- Update to 4.6.3
- Fixes CVE-2021-28957
- Fixes: rhbz#1941773
- Fixes: rhbz#1941535
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References:

[ 1 ] Bug #1941534 - CVE-2021-28957 python-lxml: missing input sanitization for formaction HTML5 attributes may lead to XSS
  https://bugzilla.redhat.com/show_bug.cgi?id=1941534
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-28723f9670' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys