CVE-2026-57227: CWE-400: Uncontrolled Resource Consumption in OISF suricata
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.
AI Analysis
Technical Summary
Suricata versions >=7.0.0 <7.0.17 and >=8.0.0 <8.0.6 contain a vulnerability in the MQTT parser implemented in rust/src/mqtt/mqtt.rs. The parser permits repeated PUBREC or PUBREL MQTT messages to be appended indefinitely to a single transaction, causing unbounded growth of transaction state. This uncontrolled resource consumption can exhaust CPU and memory resources, leading to performance degradation or denial of service. The vulnerability is classified as CWE-400 (Uncontrolled Resource Consumption) and CWE-770. It has a CVSS 3.1 score of 7.5 (High) with no confidentiality or integrity impact but high availability impact. The issue is resolved in versions 7.0.17 and 8.0.6.
Potential Impact
Exploitation of this vulnerability allows an attacker to cause a denial of service by sending crafted MQTT traffic that causes Suricata to consume excessive CPU and memory resources. There is no impact on confidentiality or integrity, but availability of the Suricata service can be severely affected, potentially disrupting network intrusion detection and prevention capabilities.
Mitigation Recommendations
This vulnerability is fixed in Suricata versions 7.0.17 and 8.0.6. Users should upgrade to at least these versions to remediate the issue. No other mitigation or workaround is indicated.
CVE-2026-57227: CWE-400: Uncontrolled Resource Consumption in OISF suricata
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.
CVSS v3.1
Score 7.5high
Affected software
OISF
suricata
pkg:github/oisf/suricataRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Suricata versions >=7.0.0 <7.0.17 and >=8.0.0 <8.0.6 contain a vulnerability in the MQTT parser implemented in rust/src/mqtt/mqtt.rs. The parser permits repeated PUBREC or PUBREL MQTT messages to be appended indefinitely to a single transaction, causing unbounded growth of transaction state. This uncontrolled resource consumption can exhaust CPU and memory resources, leading to performance degradation or denial of service. The vulnerability is classified as CWE-400 (Uncontrolled Resource Consumption) and CWE-770. It has a CVSS 3.1 score of 7.5 (High) with no confidentiality or integrity impact but high availability impact. The issue is resolved in versions 7.0.17 and 8.0.6.
Potential Impact
Exploitation of this vulnerability allows an attacker to cause a denial of service by sending crafted MQTT traffic that causes Suricata to consume excessive CPU and memory resources. There is no impact on confidentiality or integrity, but availability of the Suricata service can be severely affected, potentially disrupting network intrusion detection and prevention capabilities.
Mitigation Recommendations
This vulnerability is fixed in Suricata versions 7.0.17 and 8.0.6. Users should upgrade to at least these versions to remediate the issue. No other mitigation or workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-24T02:21:33.811Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad9fc955bf5e2cf583e405
Added to database: 09/18/2026, 20:32:09 UTC
Last enriched: 09/18/2026, 20:46:46 UTC
Last updated: 09/18/2026, 23:55:19 UTC
Views: 6
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