Описание
RabbitMQ is a messaging and streaming broker. From 4.2.0 to before 4.2.4, RabbitMQ's MQTT plugin allows for topic-level authorization using regular expressions with variable substitution. Administrators can create patterns such as ^{client_id}-sensors$ to restrict user access to topics that include their client ID. However, the client_id is provided by the user in the MQTT CONNECT packet and is inserted into the regex pattern without escaping special regex characters. This flaw enables an authenticated MQTT user to inject regex operators to bypass authorization. This vulnerability is fixed in 4.2.4 and 4.3.0.
A flaw was found in RabbitMQ. An authenticated MQTT (Message Queuing Telemetry Transport) user can bypass topic-level authorization by injecting regular expression operators. This occurs because the client ID, provided by the user in the MQTT CONNECT packet, is inserted into authorization regex patterns without proper escaping of special characters. This vulnerability allows an attacker to gain unauthorized access to topics.
Отчет
Important: An authorization bypass flaw in the RabbitMQ MQTT plugin allows an authenticated user to inject regular expression operators into the client ID, circumventing topic-level access controls. This could lead to unauthorized access to sensitive topics.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat OpenStack Platform 16.2 | rabbitmq-server | Not affected | ||
| Red Hat OpenStack Platform 17.1 | rabbitmq-server | Not affected | ||
| Red Hat OpenStack Platform 18.0 | rabbitmq-server | Not affected | ||
| Red Hat Hardened Images | rabbitmq-server4-2-main-4.2.9-0.1.hum1 | Fixed | RHSA-2026:42387 | 21.07.2026 |
| Red Hat Hardened Images | rabbitmq-server4-3-main-4.3.4-0.1.hum1 | Fixed | RHSA-2026:45128 | 24.07.2026 |
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Дополнительная информация
Статус:
EPSS
8.1 High
CVSS3
Связанные уязвимости
RabbitMQ is a messaging and streaming broker. From 4.2.0 to before 4.2.4, RabbitMQ's MQTT plugin allows for topic-level authorization using regular expressions with variable substitution. Administrators can create patterns such as ^{client_id}-sensors$ to restrict user access to topics that include their client ID. However, the client_id is provided by the user in the MQTT CONNECT packet and is inserted into the regex pattern without escaping special regex characters. This flaw enables an authenticated MQTT user to inject regex operators to bypass authorization. This vulnerability is fixed in 4.2.4 and 4.3.0.
RabbitMQ is a messaging and streaming broker. From 4.2.0 to before 4.2.4, RabbitMQ's MQTT plugin allows for topic-level authorization using regular expressions with variable substitution. Administrators can create patterns such as ^{client_id}-sensors$ to restrict user access to topics that include their client ID. However, the client_id is provided by the user in the MQTT CONNECT packet and is inserted into the regex pattern without escaping special regex characters. This flaw enables an authenticated MQTT user to inject regex operators to bypass authorization. This vulnerability is fixed in 4.2.4 and 4.3.0.
RabbitMQ is a messaging and streaming broker. From 4.2.0 to before 4.2 ...
EPSS
8.1 High
CVSS3