CVE-2019-5432
HIGHCVSS 7.5/10EPSS 1.59%
Last modified
CVE-2019-5432 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A specifically malformed MQTT Subscribe packet crashes MQTT Brokers using the mqtt-packet module versions < 3.5.1, 4.0.0 - 4.1.3, 5.0.0 - 5.6.1, 6.0.0 - 6.1.2 for decoding.. EPSS estimates a 1.59% chance of exploitation in the next 30 days.
Description
A specifically malformed MQTT Subscribe packet crashes MQTT Brokers using the mqtt-packet module versions < 3.5.1, 4.0.0 - 4.1.3, 5.0.0 - 5.6.1, 6.0.0 - 6.1.2 for decoding.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mqtt-Packet Project | Mqtt-Packet | < 3.5.1 |
| Mqtt-Packet Project | Mqtt-Packet | >= 4.0.0, <= 4.1.3 |
| Mqtt-Packet Project | Mqtt-Packet | >= 5.0.0, <= 5.6.1 |
| Mqtt-Packet Project | Mqtt-Packet | >= 6.0.0, <= 6.1.2 |
References
- https://hackerone.com/reports/541354Exploit, Issue Tracking, Patch, Third Party Advisory
- https://hackerone.com/reports/541354Exploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-5432?
A specifically malformed MQTT Subscribe packet crashes MQTT Brokers using the mqtt-packet module versions < 3.5.1, 4.0.0 - 4.1.3, 5.0.0 - 5.6.1, 6.0.0 - 6.1.2 for decoding.
How severe is CVE-2019-5432?
CVE-2019-5432 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.
How do I fix CVE-2019-5432?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2019-5432?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST