CVE-2016-1000242 — mqtt
HIGHCVE-2016-1000242 is a high-severity (CVSS 7.5) vulnerability in mqtt. A fix is available for mqtt — see the affected versions and patch details below.
Denial of Service in mqtt
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
mqttnpmDescription
Affected versions of mqtt will cause the node process to crash when receiving specially crafted MQTT packets, making the application vulnerable to a denial of service condition.
Recommendation
Update to v1.0.0 or later
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | mqtt | all versions | 1.0.0npm install mqtt@1.0.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mqtt, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update mqtt to 1.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-1000242 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Frequently Asked Questions
Is CVE-2016-1000242 in your dependencies?
Find it across npm, including transitive dependencies.