CVE-2026-61634 Security Details

CVE ID

CVE-2026-61634

CWE

CWE-20

CVE Description

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.0, the AMQP connection tuning path records the negotiated AMQP frame_max value, but src/main/java/com/rabbitmq/client/impl/SocketFrameHandler.java and NettyFrameHandlerFactory continue to validate broker-controlled frame payload lengths against maxInboundMessageBodySize because the negotiated limit is not applied consistently through setMaxInboundFramePayloadSize. A malicious or compromised broker can send a method frame larger than the negotiated frame_max during or after connection establishment, causing the client to allocate and decode a protocol-invalid frame instead of rejecting it with MalformedFrameException. The protocol violation can disrupt the affected connection and cause client-side denial of service. This issue is fixed in version 5.33.0.

Published

Jul 12, 2026

CVSS Score & Severity

6.3Medium

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS Score

0.299%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Vulnerable Methods

com/rabbitmq/client/impl/Frame.readFrom(Ljava/io/DataInputStream;I)Lcom/rabbitmq/client/impl/Frame;

JVMVulnerable params: 0

Affected Ecosystems

affected

Source

National Vulnerability Database

References

GitHub · rabbitmq/rabbitmq-java-clientPROJECT