Resource exhaustion in Oisf Suricata
CVE-2026-57227
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Oisf Suricata — versions >= 7.0.0, < 7.0.17, >= 8.0.0, < 8.0.6
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p (Mitigation, Vendor Advisory)
- github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3a (Patch)
- github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273 (Patch)
- github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5 (Patch)
- github.com/OISF/suricata/releases/tag/suricata-7.0.17 (Release Notes)
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 (Release Notes)
- redmine.openinfosecfoundation.org/issues/8525 (Permissions Required)
Frequently asked questions
- What is CVE-2026-57227?
- CVE-2026-57227 is a high-severity vulnerability in Oisf Suricata, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-18.
- How severe is CVE-2026-57227?
- High severity. CVSS v3 base score is 7.5 out of 10.