CVE-2021-34431

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CVSS 3.1

6.5 medium

EPSS

1%p64

Published

Jul 22, 2021 (Jul 22, 2021)

Modified

Jun 17, 2026

Description

In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a DoS attack against the broker.

Vendors: eclipse
Products: mosquitto
Weakness: CWE-401
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.1%)

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