A libpq security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: libpq-12.6-1.fc33

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Fedora Update Notification
FEDORA-2021-3286ac2acc
2021-02-26 01:07:35.019067
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Name : libpq
Product : Fedora 33
Version : 12.6
Release : 1.fc33
URL :   http://www.postgresql.org/
Summary : PostgreSQL client library
Description :
The libpq package provides the essential shared library for any PostgreSQL
client program or interface. You will need to install this package to use any
other PostgreSQL package or any clients that need to connect to a PostgreSQL
server.

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Update Information:

Update postgresql and libpq to the new upstream release.
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ChangeLog:

* Tue Feb 16 2021 Honza Horak - 12.6-1
- Update to 12.6
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-3286ac2acc' 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