CVE-2026-57227 Suricata - Denial of Service

Suricata 7.0.0 to 7.0.17 and 8.0.6 contain a denial of service caused by unlimited repeated PUBREC or PUBREL messages in the MQTT parser, letting attackers consume CPU and memory, exploit requires crafted MQTT traffic.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.70% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-400

Vendor fix

Update to versions 7.0.17 or 8.0.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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