VULNERABILITY INTELLIGENCE

CVE-2021-34431

CVSS score6.5 MEDIUM
EPSS probability1.11%
CISA KEVNot currently listed
Published2021-07-22
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • emo@eclipse.org: CWE-401
  • nvd@nist.gov: CWE-401

Primary references