OCTOBER 10, 2026
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Case File

CVE-2026-57227

HIGH · CVSS 7.5 EPSS 0.70% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-18 · Last synced 2026-10-10

CyberRota Analysis

AI-Generated

The MQTT parser in Suricata versions 7.0.0 to 7.0.17 and 8.0.6 is vulnerable to a denial-of-service attack due to its inability to limit the number of PUBREC or PUBREL messages in a single transaction. This flaw allows attackers to send crafted MQTT traffic that can indefinitely increase transaction state, leading to excessive CPU and memory consumption. Organizations using affected versions of Suricata should prioritize upgrading to the patched versions 8.0.6 or 7.0.17 to mitigate this risk.

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A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-57227
Severity
HIGH
CVSS
7.5
EPSS
0.70%

Original NVD 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.

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