Infinite loop in RabbitMQ Java Client Library - CVE-2026-106121
Published: November 9, 2026
Vulnerability identifier: #VU162911
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-106121
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a highly privileged remote attacker to cause denial of service in RabbitMQ Java Client applications using the default JSON-RPC mapper.
The vulnerability exists due to missing end-of-input checks in JSONReader, causing infinite loops when parsing unterminated quoted strings or line comments. A highly privileged remote attacker can publish a single truncated message to an RPC request queue, exhausting heap memory or indefinitely occupying a server thread.
Affected software
RabbitMQ Java Client Library
How to mitigate CVE-2026-106121
Install security update from vendor's website.
RabbitMQ Java Client Library - update to 5.37.0