Uncontrolled Recursion in RabbitMQ Java Client Library - CVE-2026-69220
Published: July 9, 2026 / Updated: August 19, 2026
Vulnerability identifier: #VU137270
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-69220
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in ValueReader.readTable(), readArray(), and readFieldValue() when parsing AMQP table and array values from server frames. A remote attacker can send a specially crafted deeply nested table structure to cause a denial of service.
Exploitation is possible before authentication via the initial connection.start frame, and a machine-in-the-middle can also trigger the issue.
Affected software
RabbitMQ Java Client Library
How to mitigate CVE-2026-69220
Install security update from vendor's website.
RabbitMQ Java Client Library - update to 5.33.1