Allocation of Resources Without Limits or Throttling in Suricata - CVE-2026-57227
Published: July 22, 2026
Vulnerability identifier: #VU139047
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-57227
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open Information Security Foundation
Affected software:
Suricata
Suricata
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the MQTT parser when processing repeated PUBREC or PUBREL messages within a transaction. A remote attacker can send specially crafted MQTT traffic to cause a denial of service.
The issue can lead to excessive resource consumption and slowdown before service disruption occurs.
How to mitigate CVE-2026-57227
Install security update from vendor's website.