Detections
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Fedora 44 : rabbitmq-server (2026-296b2865ba)

high Nessus Plugin ID 379976

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-296b2865ba advisory.

 Fix for CVE-2026-67421

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 Security update: backport upstream RabbitMQ security fixes to 4.2.9.

 - CVE-2026-67414: an authenticated AMQP 1.0 client could exhaust broker memory with arrays of zero-width elements; such arrays are now kept as opaque values.
 - CVE-2026-67416: AMQP 1.0 body section descriptors are now matched by exact symbol length, so crafted descriptors can no longer crash consumers.
 - CVE-2026-67418: MQTT 5 properties that are not valid for the packet type are now rejected, so a publisher can no longer disconnect matching subscribers.

 Also includes the CVE-2026-67420 fix from 4.2.9-3 (stale impersonator tag kept after OAuth token refresh). CVE-2026-67409 and CVE-2026-67410 are fixed upstream in 4.2.9.


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 Fix for CVE-2026-67420 (RabbitMQ: unauthorized user impersonation via stale OAuth token refresh). On a JWT/OAuth token refresh, rabbit_access_control:update_state/2 discarded the refreshed user tags, so a revoked 'impersonator' tag could survive on an existing connection. Backported from upstream v4.3.x (commit 5de287d).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected rabbitmq-server package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-296b2865ba

Plugin Details

Severity: High

ID: 379976

File Name: fedora_2026-296b2865ba.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 11/13/2026

Updated: 11/13/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.51

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.5

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:C

CVSS Score Source: CVE-2026-67421

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2026-67410

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 6.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-67410

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:44, p-cpe:/a:fedoraproject:fedora:rabbitmq-server

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/4/2026

Vulnerability Publication Date: 9/25/2026

Reference Information

CVE: CVE-2026-67409, CVE-2026-67410, CVE-2026-67414, CVE-2026-67416, CVE-2026-67418, CVE-2026-67420, CVE-2026-67421