CVE-2024-3935: Eclipse Mosquitto

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

In Eclipse Mosquito, versions from 2.0.0 through 2.0.18, if a Mosquitto broker is configured to create an outgoing bridge connection, and that bridge connection has an incoming topic configured that makes use of topic remapping, then if the remote connection sends a crafted PUBLISH packet to the broker a double free will occur with a subsequent crash of the broker.

Affected products

• Eclipse Mosquitto: from 2.0.0, before 2.0.19 (fixed in 2.0.19)

Published 2024-10-30. Last modified 2026-06-17.