CVE-2026-106121

RabbitMQ: JSONReader in the default JSON-RPC mapper never terminates on truncated input, causing DoS

Published Oct 6, 2026 CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-cqgh-8p3p-mx4m RabbitMQ: JSONReader in the default JSON-RPC mapper never terminates on truncated input, causing DoS
History
Type Values Removed Values Added
First Time appeared Vmware
Vmware rabbitmq Java Client
CPEs cpe:2.3:a:vmware:rabbitmq_java_client:*:*:*:*:*:*:*:*
Vendors & Products Vmware
Vmware rabbitmq Java Client
Type Values Removed Values Added
First Time appeared Com.rabbitmq
Com.rabbitmq amqp-client
Rabbitmq
Rabbitmq java-client
Vendors & Products Com.rabbitmq
Com.rabbitmq amqp-client
Rabbitmq
Rabbitmq java-client
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title RabbitMQ: JSONReader in the default JSON-RPC mapper never terminates on truncated input, causing DoS
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 6, 2026, 6:32 PM
Reserved
Oct 6, 2026, 3:33 PM
Status
Analyzed
Published
Oct 6, 2026, 7:17 PM
Modified
Oct 9, 2026, 6:26 PM