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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-63335)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-63335)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
463446	Echo: com.rabbitmq:amqp-client: security update to 5.31.0	Tenable Cloud Security	Echo Local Security Checks	Local	medium
463446	Echo: com.rabbitmq:amqp-client: security update to 5.31.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
338032	Linux Distros Unpatched Vulnerability : CVE-2026-63335	Nessus	Misc.	Local	medium
446049	SCA: security update for com.rabbitmq:amqp-client (GHSA-qx7j-jv8m-fppr)	Tenable Cloud Security	SCA Checks	Local	medium
446049	SCA: security update for com.rabbitmq:amqp-client (GHSA-qx7j-jv8m-fppr)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-63335

medium

Tenable Plugins

medium

medium

medium

medium

medium