---
id: CVE-2026-57227
title: >-
  Suricata is a network Intrusion Detection System, Intrusion Prevention System
  and Network Security Monitoring engine
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
vendor: OISF
product: suricata
affected:
  - 'suricata >= 8.0.0, < 8.0.6'
  - 'suricata >= 7.0.0, < 7.0.17'
published: '2026-09-18'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:25:00.707'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57227'
references:
  - url: >-
      https://github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3a
    label: security-advisories@github.com
  - url: >-
      https://github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273
    label: security-advisories@github.com
  - url: >-
      https://github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/releases/tag/suricata-7.0.17'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/releases/tag/suricata-8.0.6'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p'
    label: security-advisories@github.com
  - url: 'https://redmine.openinfosecfoundation.org/issues/8525'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.007
epssPercentile: 0.51072
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-22T15:47:25.096325Z'
ingestedAt: '2026-09-18T20:51:25.798Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.