RabbitMQ Java Client up to 5.30.x Command Assembler CommandAssembler.java CommandAssembler.consumeBodyFrame input validation

Summaryinfo

A vulnerability classified as problematic has been found in RabbitMQ Java Client up to 5.30.x. Affected by this vulnerability is the function CommandAssembler.consumeBodyFrame of the file src/main/java/com/rabbitmq/client/impl/CommandAssembler.java of the component Command Assembler. This manipulation causes input validation. This vulnerability is handled as CVE-2026-63335. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in RabbitMQ Java Client up to 5.30.x. It has been declared as problematic. Affected by this vulnerability is the function CommandAssembler.consumeBodyFrame of the file src/main/java/com/rabbitmq/client/impl/CommandAssembler.java of the component Command Assembler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.31.0, inbound AMQP command assembly in src/main/java/com/rabbitmq/client/impl/CommandAssembler.java processes a content-bearing method and header whose remainingBodyBytes value is smaller than a following AMQP.FRAME_BODY payload. CommandAssembler.consumeBodyFrame subtracts the peer-controlled payload length before validating that it fits, drives remainingBodyBytes negative, and throws a raw UnsupportedOperationException instead of MalformedFrameException. A malicious or compromised broker peer can send this malformed sequence on an open nonzero channel to terminate frame processing and close the client connection, causing denial of service for work using that connection. This issue is fixed in version 5.31.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-63335 since 07/16/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.31.0 eliminates this vulnerability.

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Productinfo

Type

• Programming Language Software

Vendor

• RabbitMQ

Name

• Java Client

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.11
• 5.12
• 5.13
• 5.14
• 5.15
• 5.16
• 5.17
• 5.18
• 5.19
• 5.20
• 5.21
• 5.22
• 5.23
• 5.24
• 5.25
• 5.26
• 5.27
• 5.28
• 5.29
• 5.30

CPE 2.3info

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CPE 2.2info

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