CVE-2026-67230

Undergoing Analysis Undergoing Analysis - In Progress

Denial of Service in RabbitMQ Web STOMP Plugin

Publication date: 2026-09-25

Last updated on: 2026-09-29

Assigner: GitHub, Inc.

Description

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, the Web STOMP WebSocket handler enforced neither max_frame_size nor login_timeout before authentication, allowing an unauthenticated client to keep a connection alive with a slow stream of small frames and accumulate unbounded pre-authentication state. The rabbitmq_web_stomp plugin must be enabled, and no authentication is required to reach the vulnerable path. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-25

Last Modified

2026-09-29

Generated

2026-10-16

AI Q&A

2026-09-25

EPSS Evaluated

2026-10-14

NVD

CVE-2026-67230

EUVD

EUVD-2026-87144

Affected Vendors & Products

Vendor	Product	Version / Range
rabbitmq	rabbitmq	to 3.13.15 (inc)
rabbitmq	rabbitmq	4.0.20
rabbitmq	rabbitmq	4.1.11
rabbitmq	rabbitmq	4.2.6

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

This vulnerability in RabbitMQ allows an unauthenticated attacker to keep a Web STOMP WebSocket connection alive by sending a slow stream of small frames. This causes the system to accumulate excessive pre-authentication state, potentially leading to resource exhaustion.

Detection Guidance

Check RabbitMQ version with: rabbitmqctl status | grep 'RabbitMQ version'. If using vulnerable versions (3.13.0-3.13.14, 4.0.0-4.0.19, 4.1.0-4.1.10, 4.2.0-4.2.5), update immediately. Verify if rabbitmq_web_stomp plugin is enabled with: rabbitmq-plugins list | grep stomp.

Impact Analysis

An attacker could exploit this to consume excessive server resources, causing performance degradation or denial of service. Systems with the rabbitmq_web_stomp plugin enabled and no authentication are particularly vulnerable.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized connections to accumulate state before authentication. This may lead to unauthorized access to messaging data, violating confidentiality requirements in both regulations.

Mitigation Strategies

Upgrade RabbitMQ to fixed versions (3.13.15, 4.0.20, 4.1.11, or 4.2.6). Disable rabbitmq_web_stomp plugin if not needed with: rabbitmq-plugins disable rabbitmq_web_stomp. If authentication is not required, enable it to prevent unauthenticated connections.

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