Description
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.
Affected products
oisf: suricata
References7
- github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p MitigationVendor Advisory
- github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f4… Patch
- github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d5495… Patch
- github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8… Patch
- github.com/OISF/suricata/releases/tag/suricata-7.0.17 Release Notes
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 Release Notes
- redmine.openinfosecfoundation.org/issues/8525 Permissions Required
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 53 · as of 8 November 2026
- CWE
- CWE-400CWE-770
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