CVE-2025-12790
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-06

Last updated on: 2025-11-12

Assigner: Red Hat, Inc.

Description
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.
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Meta Information
Published
2025-11-06
Last Modified
2025-11-12
Generated
2026-06-16
AI Q&A
2025-11-06
EPSS Evaluated
2026-06-15
NVD
CVE-2025-12790
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
rubygems mqtt 3.1
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-29 The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '\..\filename' (leading backslash dot dot) sequences that can resolve to a location that is outside of that directory.
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Executive Summary

This vulnerability is a flaw in the Rubygem MQTT package where, by default, hostname validation is not performed. This lack of validation can allow an attacker to perform a Man-in-the-Middle (MITM) attack by intercepting and potentially altering the communication between the client and the MQTT server.

Impact Analysis

The vulnerability can impact you by exposing your MQTT communications to Man-in-the-Middle (MITM) attacks. This means an attacker could intercept, read, or modify the data being transmitted, leading to potential loss of confidentiality and integrity of your information.

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