vulnerability
Ubuntu: USN-6492-1 (CVE-2021-34431): Mosquitto vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:L/Au:S/C:N/I:N/A:P) | Jul 22, 2021 | Nov 22, 2023 | Apr 16, 2026 |
Severity
4
CVSS
(AV:N/AC:L/Au:S/C:N/I:N/A:P)
Published
Jul 22, 2021
Added
Nov 22, 2023
Modified
Apr 16, 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.
Solutions
ubuntu-pro-upgrade-mosquittoubuntu-upgrade-mosquitto
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.