Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-106121

CVE-2026-106121HIGH

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0050   41.6     —

AFFECTED
  Product               Versions    Fixed
  rabbitmq-java-client  < 5.36.1 –  —
  amqp-client           < 5.36.1 –  —

TIMELINE
  Oct 6   Reserved by GitHub_M
  Oct 6   Published (CNA: GitHub_M)
  Oct 9   EXPLOIT PUBLISHED — CVE-2026-106121 (rabbitmq-java-client). Public exploit reference added.
  Oct 9   RESCORED — CVE-2026-106121 (rabbitmq-java-client). CVSS 4.9 → 7.5 (NVD).

CWE-835 · CNA: GitHub_M · CVSS v3.1 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
October 6, 2026	Reserved	Reserved by GitHub_M
October 6, 2026	Published	Published (CNA: GitHub_M)
October 9, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-106121 (rabbitmq-java-client). Public exploit reference added.
October 9, 2026	RESCORED	RESCORED — CVE-2026-106121 (rabbitmq-java-client). CVSS 4.9 → 7.5 (NVD).

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
rabbitmq	rabbitmq-java-client	—	< 5.36.1	—
com.rabbitmq	amqp-client	—	< 5.36.1	—

Weaknesses

CWE-835

References (4)

https://github.com/rabbitmq/rabbitmq-java-client/commit/25fad817291feff3195c32620117d295598f8b41 [Patch]
https://github.com/rabbitmq/rabbitmq-java-client/pull/2100 [Patch]
https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.37.0 [Release Notes]
https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-cqgh-8p3p-mx4m [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-106121 at cve.org

Vendors: rabbitmq · com.rabbitmq

Weaknesses: CWE-835

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-106121 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.