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GHSA-9c5q-w6gr-fxcq

MQTT does not validate hostnames

Source: GitHub Advisory Database (reviewed) High CVE-2025-12790

Packages

EcosystemPackageAffectedFixed in
RubyGems mqtt < 0.7.0 0.7.0

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.