Vulnerability Details CVE-2026-57227
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 7.0.0 until 7.0.17 and 8.0.6, the MQTT parser in rust/src/mqtt/mqtt.rs permits repeated PUBREC or PUBREL messages to be appended to one transaction without a limit. Crafted MQTT traffic can grow transaction state indefinitely, consuming CPU and memory and causing slowdown or denial of service. This issue is fixed in versions 8.0.6 and 7.0.17.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 33.7%
CVSS Severity
CVSS v3 Score 7.5
References
- https://github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3a
- https://github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273
- https://github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5
- https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
- https://github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p
- https://redmine.openinfosecfoundation.org/issues/8525