CVE-2021-41039

PoC —

CVSS 3.1

7.5 high

EPSS

1%p68

Published

Dec 1, 2021 (Dec 1, 2021)

Modified

Jun 17, 2026

Description

In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.

Vendors: eclipse
Products: mosquitto
Weakness: CWE-1050
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.3%)

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