Uncontrolled Memory Allocation in RabbitMQ Java Client Library - #VU137269
Published: July 9, 2026
Vulnerability identifier: #VU137269
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: VMware, Inc
Affected software:
RabbitMQ Java Client Library
RabbitMQ Java Client Library
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to memory allocation with excessive size value in ValueReader.readBytes() when processing a LongString or bytes field from an AMQP peer. A remote attacker can send a specially crafted AMQP field with an oversized declared length to cause a denial of service.
The issue can be triggered pre-authentication during connection.start, and successful exploitation can crash the entire JVM with an OutOfMemoryError.
Remediation
Install security update from vendor's website.