Suricata mqtt: unbounded resource consumption from repeated pubrec and pubrel messages

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57227
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 21:17:01 UTC
Updated2026-09-29 12:48:01 UTC
DescriptionSuricata 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.007000000 probability, percentile 0.510720000 (date 2026-09-24)

Problem Types: CWE-400 | CWE-770 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Oisf Suricata All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OISF Suricata affected >= 8.0.0, < 8.0.6 Not specified
CNA OISF Suricata affected >= 7.0.0, < 7.0.17 Not specified

References

ReferenceSourceLinkTags
redmine.openinfosecfoundation.org/issues/8525 [email protected] redmine.openinfosecfoundation.org Permissions Required
github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273 [email protected] github.com Patch
github.com/OISF/suricata/releases/tag/suricata-8.0.6 [email protected] github.com Release Notes
github.com/OISF/suricata/releases/tag/suricata-7.0.17 [email protected] github.com Release Notes
github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3a [email protected] github.com Patch
github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p [email protected] github.com Mitigation, Vendor Advisory
github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5 [email protected] github.com Patch
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