A pygments security update has been released for Debian GNU/Linux 10 to address a CPU exhaustion attack vulnerability.

DSA 4870-1: pygments security update

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Debian Security Advisory DSA-4870-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
March 12, 2021   https://www.debian.org/security/faq
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Package : pygments
CVE ID : CVE-2021-20270

It was discovered that Pygments, a syntax highlighting package written
in Python, could be forced into an infinite loop, resulting in denial
of service.

For the stable distribution (buster), this problem has been fixed in
version 2.3.1+dfsg-1+deb10u1.

We recommend that you upgrade your pygments packages.

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/