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CVE-2026-67419 Details

Description

RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive # segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. The matcher materializes duplicate destinations before deduplication, causing combinatorial CPU work and memory pressure that can disrupt routing for all tenants. This vulnerability is fixed in 4.3.5.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cq	CISA-ADP
https://github.com/rabbitmq/rabbitmq-server/commit/c5ed7c4e97e02be688730803604cc7a88dbe4864	[email protected]
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5	[email protected]
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cq	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1333	Inefficient Regular Expression Complexity	[email protected]
CWE-407	Inefficient Algorithmic Complexity	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 25, 2026	CVE Modified	CISA-ADP
Sep 25, 2026	New CVE Received	[email protected]