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.
Published: 2026-10-06
Score: 4.9 Medium
EPSS: n/a
KEV: No
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Remediation

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History

Tue, 06 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Tue, 06 Oct 2026 18:30:00 +0000

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'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-06T18:32:46.845Z

Reserved: 2026-10-06T15:33:55.333Z

Link: CVE-2026-106121

cve-icon Vulnrichment

Updated: 2026-10-06T18:32:26.973Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-06T19:17:43.193

Modified: 2026-10-06T20:03:40.690

Link: CVE-2026-106121

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-06T19:45:04Z

Weaknesses
  • CWE-835

    Loop with Unreachable Exit Condition ('Infinite Loop')