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CVE-2026-42209

MEDIUM

6.5

Description

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.

Details CVE

Score CVSS v3.16.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie5/8/2026

Derniere modification5/13/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-369

References

https://github.com/halfgaar/FlashMQ/commit/193b6e7767889511cfa8e933908ea5e6a1077a1f(security-advisories@github.com)

https://github.com/halfgaar/FlashMQ/issues/167(security-advisories@github.com)

https://github.com/halfgaar/FlashMQ/releases/tag/v1.26.1(security-advisories@github.com)

https://github.com/halfgaar/FlashMQ/security/advisories/GHSA-2789-vfcg-5922(security-advisories@github.com)

https://github.com/halfgaar/FlashMQ/issues/167(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlations IOC

Aucune correlation enregistree

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