Description
hmq v1.5.5 is vulnerable to Denial of Service (DoS) due to a Null Pointer Exception. A remote attacker can trigger a broker crash by sending a specially crafted MQTT UNSUBSCRIBE packet with an illegal control character Topic. The failure to properly validate this field leads to a null pointer dereference, resulting in the immediate termination of the hmq process.
Metrics
CVSS 3.1 5.3/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LAffected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| fhmq | hmq | 1.5.5 |
References
Timeline
- Published
- May 29, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Deferred