CVE-2026-57227
Suricata mqtt: unbounded resource consumption from repeated pubrec and pubrel messages
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 CWE-770 |
| Vendor | oisf |
| Product | suricata |
| Published | Sep 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
OISF / suricata
>= 8.0.0, < 8.0.6 >= 7.0.0, < 7.0.17
References
github.com: https://github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p github.com: https://github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3a github.com: https://github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273 github.com: https://github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5 github.com: https://github.com/OISF/suricata/releases/tag/suricata-7.0.17 github.com: https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 redmine.openinfosecfoundation.org: https://redmine.openinfosecfoundation.org/issues/8525