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2 vulnerabilities by halfgaar
CVE-2026-42209 (GCVE-0-2026-42209)
Vulnerability from cvelistv5 – Published: 2026-05-08 21:40 – Updated: 2026-05-11 15:59
VLAI
Title
FlashMQ: Division by zero crash when using non-default deferred retained message setting
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.
Severity
6.5 (Medium)
CWE
- CWE-369 - Divide By Zero
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/halfgaar/FlashMQ/security/advi… | x_refsource_CONFIRM |
| https://github.com/halfgaar/FlashMQ/issues/167 | x_refsource_MISC |
| https://github.com/halfgaar/FlashMQ/commit/193b6e… | x_refsource_MISC |
| https://github.com/halfgaar/FlashMQ/releases/tag/… | x_refsource_MISC |
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CVE-2025-62723 (GCVE-0-2025-62723)
Vulnerability from cvelistv5 – Published: 2025-10-24 20:16 – Updated: 2025-10-24 20:32
VLAI
Title
FlashMQ does not release memory of queued QoS messages
Summary
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.
Severity
4.3 (Medium)
CWE
- CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/halfgaar/FlashMQ/security/advi… | x_refsource_CONFIRM |
| https://github.com/halfgaar/FlashMQ/issues/154 | x_refsource_MISC |
| https://github.com/halfgaar/FlashMQ/commit/e86c49… | x_refsource_MISC |
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