CVE-2026-57227

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductOisf Suricata

PublishedSep 18, 2026

First seenSep 18, 2026

Weakness typeCWE-400Uncontrolled resource consumption CWE-770Allocation of resources without limits

How to fix

Update

oisf suricata7.0.17, 8.0.6 or later

Affected products

Product	Affected versions	Fixed in
oisf suricata	7.0.0 ≤ v < 7.0.17, 8.0.0 ≤ v < 8.0.6	7.0.17, 8.0.6

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.