CVE-2025-12790

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.

CVSS 3.1

7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-25)

CWE

CWE-29

Published

2025-11-06

Modified

2026-10-18

Record from

the NVD, synced 2026-10-19

Packages (OSV)

References

• https://access.redhat.com/security/cve/CVE-2025-12790
• https://bugzilla.redhat.com/show_bug.cgi?id=2413004
• https://github.com/njh/ruby-mqtt/blob/main/NEWS.md#ruby-mqtt-version-070-2025-10-29

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