A curl security update has been released for Debian GNU/Linux 11 to address a denial of service issue.

DSA 5365-1: curl security update

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Debian Security Advisory DSA-5365-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
February 27, 2023   https://www.debian.org/security/faq
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Package : curl
CVE ID : CVE-2023-23916

Patrick Monnerat discovered that Curl's support for "chained" HTTP
compression algorithms was susceptible to denial of service.

For the stable distribution (bullseye), this problem has been fixed in
version 7.74.0-1.3+deb11u7. This update also fixes a regression in
the previously released fix for CVE-2022-27774.

We recommend that you upgrade your curl packages.

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

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/