CVE-2023-3592: Eclipse Mosquitto

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

In Mosquitto before 2.0.16, a memory leak occurs when clients send v5 CONNECT packets with a will message that contains invalid property types.

Affected products

• Eclipse Mosquitto: before 2.0.16 (fixed in 2.0.16)

Published 2023-10-02. Last modified 2026-06-17.