CVE-2026-8686 — DoS from MQTT v5.0 Deserialization Fault in core MQTT
Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet. To remedia…
Published: 2026-05-15 · CVSS: 8.7 · CVSS 4.0
Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet. To remediate this issue, users should upgrade to v5.0.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7