CVE-2026-57227

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

Published: Sep 18, 2026Updated: Sep 23, 2026 Sources: CVE List NVDCWE-400

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-400 CWE-770

Affected Products

OISF

oss-projectaka suricata, libhtp, suricata-update

suricataOn-premNetwork Device

Networking Infrastructure / firewall

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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References

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

and 4 more references View all →

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