CVE-2024-50947Network attack vector

Broker crash via rapid crafted MQTT packets

Published Dec 4, 2024 · Updated Dec 5, 2024

Denial of service in KMQTT 0.2.7 allows remote attackers to crash the broker with a rapid burst of crafted MQTT packets. The referenced report says traffic above 100 packets per second triggers an uncaught Kotlin ConcurrentModificationException that terminates the broker. No authentication or user interaction is required; the report names 0.4.8 rather than the CVE record's affected 0.2.7, leaving that discrepancy unresolved.

CVSS severity7.5
High
EPSS probability0.43%
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 KMQTT 0.2.7 allows remote attackers to crash the broker with a rapid burst of crafted MQTT packets. The referenced report says traffic above 100 packets per second triggers an uncaught Kotlin ConcurrentModificationException that terminates the broker. No authentication or user interaction is required; the report names 0.4.8 rather than the CVE record's affected 0.2.7, leaving that discrepancy unresolved.

The record

CVE
CVE-2024-50947
Published
Dec 4, 2024
Updated
Dec 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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