CVE-2026-67222

RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15, 4.0.20, 4.1.11, and 4.2.6, mechanisms/1 applied list_to_atom/1 to every colon-delimited token in an attacker-controlled auth_mechanism value, permanently consuming Erlang VM atoms and allowing the node to be crashed with a large request. Exploitation requires the Shovel or Federation plugin to be in use, and setting auth_mechanism requires the policymaker tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6	Release Notes
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-85jr-6rr2-j73r	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:broadcom:rabbitmq_server::::::::
	cpe:2.3:a:broadcom:rabbitmq_server::::::::
	cpe:2.3:a:broadcom:rabbitmq_server::::::::
	cpe:2.3:a:broadcom:rabbitmq_server::::::::

History

15 Oct 2026, 20:01

Type	Values Removed	Values Added
First Time		Broadcom rabbitmq Server Broadcom
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
CPE		cpe:2.3:a:broadcom:rabbitmq_server::::::::
References	~~() https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 -~~	() https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 - Release Notes
References	~~() https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-85jr-6rr2-j73r -~~	() https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-85jr-6rr2-j73r - Vendor Advisory

25 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-25 17:17

Updated : 2026-10-15 20:01

NVD link : CVE-2026-67222

Mitre link : CVE-2026-67222

CVE.ORG link : CVE-2026-67222

JSON object : View

Products Affected

broadcom

rabbitmq_server

CWE

CWE-400

Uncontrolled Resource Consumption

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