CVE-2023-46120Public exploitNetwork attack vector

Consumer crash via unbounded inbound message assembly

Published Oct 24, 2023 · Updated Sep 11, 2024

Uncontrolled resource consumption in RabbitMQ Java Client before 5.18.0 allows remote authenticated users to crash consumers via large messages. AMQCommand's CommandAssembler accepted body frames without enforcing a maximum aggregate body length, allowing the declared size to drive unbounded in-memory assembly. Remote authenticated users able to publish an oversized message through the broker can exhaust the receiving consumer's JVM heap and trigger an out-of-memory error.

CVSS severity7.5
High
EPSS probability1.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in RabbitMQ Java Client before 5.18.0 allows remote authenticated users to crash consumers via large messages. AMQCommand's CommandAssembler accepted body frames without enforcing a maximum aggregate body length, allowing the declared size to drive unbounded in-memory assembly. Remote authenticated users able to publish an oversized message through the broker can exhaust the receiving consumer's JVM heap and trigger an out-of-memory error.

The record

CVE
CVE-2023-46120
Published
Oct 24, 2023
Updated
Sep 11, 2024
Vendor
RabbitMQ
Product
RabbitMQ Java Client
Classifications
CWE-400, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2024Record 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=0 <5.18.0
  2. Affected versionversion=< 5.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RabbitMQ · RabbitMQ Java Clientversion=0 <5.18.0; version=< 5.18.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.9GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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