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CVE-2026-69219— RabbitMQ Java client ValueReader: Oversized LongString/bytes length triggers OOM via unchecked allocation

Quick assessment

Affected
rabbitmq rabbitmq-java-client
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RabbitMQ rabbitmq-java-client是RabbitMQ组织的一款信息化产品。 RabbitMQ rabbitmq-java-client 5.33.1之前版本存在资源管理错误漏洞，该漏洞源于ValueReader.readBytes在未检查帧中可用字节数的情况下，根据声明的contentLength分配内存，恶意AMQP对端可发送特制字段导致约2GB内存分配和内存耗尽，造成拒绝服务。

CVSS 8.7 · High EPSS 0.40% · P33

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
rabbitmq rabbitmq-java-client < 5.33.1 affected
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I. Basic Information for CVE-2026-69219

Vulnerability Information
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Vulnerability Title
RabbitMQ Java client ValueReader: Oversized LongString/bytes length triggers OOM via unchecked allocation
Source: CVE Program / CVE List V5
Vulnerability Description
The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.1, src/main/java/com/rabbitmq/client/impl/ValueReader.java uses ValueReader.readBytes to accept a wire-declared contentLength below Integer.MAX_VALUE and allocate a byte array before checking the bytes available in the frame. A malicious AMQP peer can send a LongString or byte-array field with type tag S and a declared length such as 0x7FFFFFFE during the pre-authentication connection.start server-properties table, causing an approximately 2 GB allocation and OutOfMemoryError before readFully consumes data. The resulting memory exhaustion can terminate the JVM and cause denial of service. This issue is fixed in version 5.33.1.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
RabbitMQ rabbitmq-java-client 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RabbitMQ rabbitmq-java-client是RabbitMQ组织的一款信息化产品。 RabbitMQ rabbitmq-java-client 5.33.1之前版本存在资源管理错误漏洞，该漏洞源于ValueReader.readBytes在未检查帧中可用字节数的情况下，根据声明的contentLength分配内存，恶意AMQP对端可发送特制字段导致约2GB内存分配和内存耗尽，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rabbitmq rabbitmq-java-client < 5.33.1 -

II. Public POCs for CVE-2026-69219

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 12718 chars
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III. Intelligence Information for CVE-2026-69219

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Patches & Fixes for CVE-2026-69219 (4)

Other References for CVE-2026-69219 (1)

Same Patch Batch · rabbitmq · 2026-08-18 · 6 CVEs total

CVE-2026-69220 8.7 HIGH RabbitMQ Java client ValueReader: Unbounded recursive table/array nesting causes StackOver
CVE-2026-63337 7.5 HIGH RabbitMQ Java client: Unvalidated Class.forName in JSON-RPC ProcedureDescription enables a
CVE-2026-63335 6.3 MEDIUM RabbitMQ Java client malformed body frame triggers raw command assembler exception
CVE-2026-63336 5.1 MEDIUM RabbitMQ Java client: TrustEverythingTrustManager used by default in useSslProtocol() enab
CVE-2026-61634 RabbitMQ Java client accepts broker frames larger than the negotiated AMQP frame_max

IV. Related Vulnerabilities

Same product: rabbitmq-java-client
Same vendor: rabbitmq
Same weakness: CWE-789

V. Comments for CVE-2026-69219

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