CVE-2026-106121
RabbitMQ: JSONReader in the default JSON-RPC mapper never terminates on truncated input, causing DoS
- State
- Published
- Severity
- 4.9 Medium
- Published
- Oct 6, 2026
- Updated
- Oct 6, 2026
- Reserved
- Oct 6, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.9 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Products
| Product | Versions |
|---|---|
rabbitmq-java-clientrabbitmq |
|
amqp-clientcom.rabbitmq |
|
References
- https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-cqgh-8p3p-mx4m
- https://github.com/rabbitmq/rabbitmq-java-client/pull/2100
- https://github.com/rabbitmq/rabbitmq-java-client/commit/25fad817291feff3195c32620117d295598f8b41
- https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.37.0
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