CVE-2026-57218: CWE-863: Incorrect Authorization in rabbitmq rabbitmq-server
RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.
AI Analysis
Technical Summary
CVE-2026-57218 describes an incorrect authorization vulnerability (CWE-863) in RabbitMQ server versions before 4.2.6. Specifically, AMQP 0-9-1 consumers remain active and continue receiving messages after their OAuth tokens expire or their permissions are reduced via connection.update_secret refresh. This happens because the server does not cancel or reauthorize existing consumers at message delivery time following changes to the channel user state. The vulnerability allows consumers to bypass updated authorization constraints until they disconnect. The issue has been resolved in RabbitMQ version 4.2.6.
Potential Impact
Affected RabbitMQ servers allow existing consumers to receive messages beyond their authorized scope after OAuth token expiration or scope reduction, potentially leading to unauthorized message consumption. This could result in information disclosure or unauthorized access to message streams until the consumer disconnects or the server is upgraded.
Mitigation Recommendations
Upgrade RabbitMQ server to version 4.2.6 or later, where this authorization issue is fixed. No other official remediation or temporary fixes are documented. Patch status is confirmed fixed in 4.2.6.
CVE-2026-57218: CWE-863: Incorrect Authorization in rabbitmq rabbitmq-server
Description
RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.
CVSS v4.0
Score 4.9medium
Affected software
pkg:github/rabbitmq/rabbitmq-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-57218 describes an incorrect authorization vulnerability (CWE-863) in RabbitMQ server versions before 4.2.6. Specifically, AMQP 0-9-1 consumers remain active and continue receiving messages after their OAuth tokens expire or their permissions are reduced via connection.update_secret refresh. This happens because the server does not cancel or reauthorize existing consumers at message delivery time following changes to the channel user state. The vulnerability allows consumers to bypass updated authorization constraints until they disconnect. The issue has been resolved in RabbitMQ version 4.2.6.
Potential Impact
Affected RabbitMQ servers allow existing consumers to receive messages beyond their authorized scope after OAuth token expiration or scope reduction, potentially leading to unauthorized message consumption. This could result in information disclosure or unauthorized access to message streams until the consumer disconnects or the server is upgraded.
Mitigation Recommendations
Upgrade RabbitMQ server to version 4.2.6 or later, where this authorization issue is fixed. No other official remediation or temporary fixes are documented. Patch status is confirmed fixed in 4.2.6.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-24T02:21:33.810Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a515a8b68715ace432d831a
Added to database: 07/10/2026, 20:48:11 UTC
Last enriched: 07/18/2026, 15:24:43 UTC
Last updated: 08/24/2026, 04:58:27 UTC
Views: 124
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