CVE-2026-69220Network attack vector

Pre-authentication client crash via nested AMQP fields

Published Aug 18, 2026 · Updated Aug 18, 2026

Denial of service in RabbitMQ RabbitMQ Java Client before 5.33.1 allows remote attackers to crash the client via crafted AMQP frames. In com.rabbitmq.client.impl.ValueReader, readTable and readArray recurse into readFieldValue for AMQP F and A field types without a nesting-depth check, so a deeply nested connection.start table can overflow the JVM stack. Reachability is pre-authentication and also includes man-in-the-middle delivery from a network intermediary; the observed consequence is termination of the client I/O thread rather than code execution or data exposure.

CVSS severity8.7
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in RabbitMQ RabbitMQ Java Client before 5.33.1 allows remote attackers to crash the client via crafted AMQP frames. In com.rabbitmq.client.impl.ValueReader, readTable and readArray recurse into readFieldValue for AMQP F and A field types without a nesting-depth check, so a deeply nested connection.start table can overflow the JVM stack. Reachability is pre-authentication and also includes man-in-the-middle delivery from a network intermediary; the observed consequence is termination of the client I/O thread rather than code execution or data exposure.

The record

CVE
CVE-2026-69220
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
RabbitMQ
Product
RabbitMQ Java Client
Classifications
CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.33.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RabbitMQ · RabbitMQ Java Clientversion=< 5.33.1

Published CVSS scores

8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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