The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes

Overview

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.1, src/main/java/com/rabbitmq/client/impl/ValueReader.java uses ValueReader.readBytes to accept a wire-declared contentLength below Integer.MAX_VALUE and allocate a byte array before checking the bytes available in the frame. A malicious AMQP peer can send a LongString or byte-array field with type tag S and a declared length such as 0x7FFFFFFE during the pre-authentication connection.start server-properties table, causing an approximately 2 GB allocation and OutOfMemoryError before readFully consumes data. The resulting memory exhaustion can terminate the JVM and cause denial of service. This issue is fixed in version 5.33.1.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-69219)

Affected packages:

• com.rabbitmq:amqp-client <= 5.33.0

Patched in:

• com.rabbitmq:amqp-client 5.33.1

Source: https://github.com/advisories/GHSA-68mj-5wr7-6fgg