A rdflib security update has been released for Debian GNU/Linux 9 LTS to address an issue that could allow code injection.

DLA 2861-1: rdflib security update

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Debian LTS Advisory DLA-2861-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Adrian Bunk
December 28, 2021   https://wiki.debian.org/LTS
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Package : rdflib
Version : 4.2.1-2+deb9u1
CVE ID : CVE-2019-7653
Debian Bug : 921751

The python-rdflib-tools package (tools for converting to and from RDF)
had wrappers that could load Python modules from the current working
directory, allowing code injection.

For Debian 9 stretch, this problem has been fixed in version
4.2.1-2+deb9u1.

We recommend that you upgrade your rdflib packages.

For the detailed security status of rdflib please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/rdflib

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