CVE-2026-57227
Crafted MQTT traffic can grow transaction state indefinitely, consuming CPU and memory and causing slowdown or denial of service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.70%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.70% probability · 53th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-770
- Affected
- oisf/suricata
- Source
- security-advisories@github.com
EPSS 0.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3aPatch
- https://github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273Patch
- https://github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5Patch
- https://github.com/OISF/suricata/releases/tag/suricata-7.0.17Release Notes
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6Release Notes
- https://github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6pMitigation, Vendor Advisory
- https://redmine.openinfosecfoundation.org/issues/8525Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.