CVE-2017-7653: Debian Linux

Medium severity, CVSS 5.3. EPSS: 1.5% chance of exploitation in the next 30 days.

The Eclipse Mosquitto broker up to version 1.4.15 does not reject strings that are not valid UTF-8. A malicious client could cause other clients that do reject invalid UTF-8 strings to disconnect themselves from the broker by sending a topic string which is not valid UTF-8, and so cause a denial of service for the clients.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only
• Eclipse Mosquitto: up to and including 1.4.15

Published 2018-06-05. Last modified 2026-06-17.