https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-06T21:26:07.741733+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2026-42209 CVE-2026-42209 — FlashMQ: Division by zero crash when using non-default deferred retained message setting 2026-10-06T21:26:07.757040+00:00

Affected: halfgaar FlashMQ

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.