CVE-2025-62723

FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.23.2, any authenticated user can create sessions and have them collect QoS messages. When not sent to a client, these are then not released upon (eventual) session expiration. Version 1.23.2 fixes the issue.

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS

0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-25)

CWE

CWE-772

Published

2025-10-24

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• flashmq:flashmq

References

• https://github.com/halfgaar/FlashMQ/commit/e86c49360ef4387440c97f591770cdb9284b4ee9
• https://github.com/halfgaar/FlashMQ/issues/154
• https://github.com/halfgaar/FlashMQ/security/advisories/GHSA-7mhp-22q4-r6vv

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