Improper Handling of Exceptional Conditions and Origin Validation Error in Eclipse Paho Java client library
In the Eclipse Paho Java client library version 1.2.0, when connecting to an MQTT server using TLS and setting a host name verifier, the result of that verification is not checked. This could allow one MQTT server to impersonate another and provide the client library with incorrect information.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.eclipse.paho:org.eclipse.paho.client.mqttv3 | < 1.2.1 | 1.2.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-346, CWE-755- Platform
- Java / Kotlin (Maven)
- Package
org.eclipse.paho:org.eclipse.paho.client.mqttv3- Disclosed
- 17.09.2019
- Updated
- 11.10.2026 11:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-63qc-p2x4-9fgf - CC BY 4.0
Vulnerability history: org.eclipse.paho:org.eclipse.paho.client.mqttv3
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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