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CVE-2025-12790

Good to know:

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Date: November 6, 2025

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.

Severity Score

Related Resources (6)

https://github.com/njh/ruby-mqtt/blob/main/NEWS.md#ruby-mqtt-version-070-2025-10-29
https://access.redhat.com/security/cve/CVE-2025-12790
https://bugzilla.redhat.com/show_bug.cgi?id=2413004
http://github.com/njh/ruby-mqtt
https://nvd.nist.gov/vuln/detail/CVE-2025-12790
https://www.mend.io/vulnerability-database/CVE-2025-12790

Severity Score

Weakness Type (CWE)

Path Traversal: '..filename'

CWE-29

Top Fix

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Upgrade to version mqtt - 0.7.0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): NONE

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