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[USN-8437-1] rabbitmq-c vulnerabilities

Posted on 16 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8437-1
June 16, 2026

librabbitmq vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in rabbitmq-c.

Software Description:
- librabbitmq: AMQP client library written in C

Details:

It was discovered that rabbitmq-c exposed credentials in command-line
arguments under certain circumstances. A local attacker could possibly use
this issue to obtain sensitive information. This issue only affected Ubuntu
22.04 LTS and Ubuntu 24.04 LTS. (CVE-2023-35789)

It was discovered that rabbitmq-c incorrectly handled AMQP frame lengths
under certain circumstances, which could lead to an out-of-bounds read. A
remote attacker could possibly use this issue to cause rabbitmq-c to crash,
resulting in a denial of service. (CVE-2026-44235)

It was discovered that rabbitmq-c incorrectly handled AMQP login handshakes
under certain circumstances, which could lead to a heap buffer overflow. A
remote attacker could possibly use this issue to cause rabbitmq-c to crash,
resulting in a denial of service, or execute arbitrary code.
(CVE-2026-44236)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
amqp-tools 0.15.0-1ubuntu0.26.04.1
librabbitmq4 0.15.0-1ubuntu0.26.04.1

Ubuntu 25.10
amqp-tools 0.15.0-1ubuntu0.25.10.1
librabbitmq4 0.15.0-1ubuntu0.25.10.1

Ubuntu 24.04 LTS
amqp-tools 0.11.0-1ubuntu0.1
librabbitmq4 0.11.0-1ubuntu0.1

Ubuntu 22.04 LTS
amqp-tools 0.10.0-1ubuntu2.1
librabbitmq4 0.10.0-1ubuntu2.1

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8437-1
CVE-2023-35789, CVE-2026-44235, CVE-2026-44236

Package Information:
https://launchpad.net/ubuntu/+source/librabbitmq/0.15.0-1ubuntu0.26.04.1
https://launchpad.net/ubuntu/+source/librabbitmq/0.15.0-1ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/librabbitmq/0.11.0-1ubuntu0.1
https://launchpad.net/ubuntu/+source/librabbitmq/0.10.0-1ubuntu2.1

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