CVE-2026-106121
RabbitMQ: JSONReader in the default JSON-RPC mapper never terminates on truncated input, causing DoS
The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.37.0, com.rabbitmq.tools.json.JSONReader.read() fails to terminate when input ends inside a quoted string or a line comment because its string and whitespace scanners do not stop at CharacterIterator.DONE. The default DefaultJsonRpcMapper passes JSON-RPC message bodies to this parser for JsonRpcServer and client replies. A truncated string causes the parser to append replacement end markers until heap exhaustion, while a line comment without a terminating newline can keep a thread consuming CPU indefinitely, resulting in denial of service. This issue is fixed in version 5.37.0.
- Affected
- rabbitmq · com.rabbitmq · rabbitmq-java-client · amqp-client
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS v3.1 GITHUB
- 4.9 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.50% chance of exploitation in the next 30 days, 42nd percentile
- Published
- 2026-10-06
Proof-of-concept exploits (1)
Security advisories
- rabbitmq/rabbitmq-java-client/security/advisories/GHSA-cqgh-8p3p-mx4m
- rabbitmq/rabbitmq-java-client/pull/2100