cvedb.io
CVE-2026-42209
MEDIUM · CVSS 6.5
EPSS exploitation probability: 0%
Published 2026-05-08T22:16:32.103 · Last modified 2026-06-17T10:47:30.937

Summary

FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.26.1, a remote client with retained publish permission can crash the FlashMQ broker when both set_retained_message_defer_timeout and set_retained_message_defer_timeout_spread are configured to non-default values, resulting in denial of service. If anonymous retained publishing is allowed, no authentication is required; otherwise, the attacker needs the corresponding publish permission. This issue has been patched in version 1.26.1.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.