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Medium · 6.5 CVE-2026-46411 EUVD-2026-35872

FlashMQ: Client can trigger uncaught exception on FlashMQ 1.26.1 and older

Published Jun 9, 2026 · Updated Jun 10, 2026 · Assigned by GitHub_M

Description

FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.26.2, authorized clients have the ability to exceed the permitted over-commit of their write buffer and triggering an internal safe-guard exception. This exception was in a path that was not catchable, and therefore causes a server abort. This issue has been patched in version 1.26.2.

Affected products

VendorProductAffectedFixed
halfgaar FlashMQ < 1.26.2 —

References