A rabbitmq-server security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: rabbitmq-server-3.8.18-1.fc34

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Fedora Update Notification
FEDORA-2021-bf942f1fa3
2021-07-06 00:44:31.538391
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Name : rabbitmq-server
Product : Fedora 34
Version : 3.8.18
Release : 1.fc34
URL :   https://www.rabbitmq.com/
Summary : The RabbitMQ server
Description :
RabbitMQ is an implementation of AMQP, the emerging standard for high
performance enterprise messaging. The RabbitMQ server is a robust and
scalable implementation of an AMQP broker.

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Update Information:

RabbitMQ ver. 3.8.18
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ChangeLog:

* Sun Jun 27 2021 Peter Lemenkov - 3.8.18-1
- Ver. 3.8.18
* Fri Jun 11 2021 John Eckersberg - 3.8.17-1
- Ver. 3.8.17
- Switch from /var/run to /run in tmpfiles to remove warning
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-bf942f1fa3' 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