CVE-2025-12790
Rubygem-mqtt: rubygem-mqtt hostname validation
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in Rubygem MQTT. By default, the package used to not have hostname validation, resulting in possible Man-in-the-Middle (MITM) attack.
| CWE | CWE-29 |
| Vendor | nicholas j humfrey |
| Product | ruby-mqtt |
| Published | Nov 6, 2025 |
| Last Updated | Feb 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Nicholas J Humfrey / ruby-mqtt
0 < 0.7.0
Red Hat / Red Hat Satellite 6
All versions affected Red Hat / Red Hat Satellite 6
All versions affected