Inefficient Algorithmic Complexity in Suricata - CVE-2026-31933
Published: April 27, 2026
Vulnerability identifier: #VU128051
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-31933
CWE-ID: CWE-407
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient algorithmic complexity in stream inspection when processing specially crafted traffic. A remote attacker can send specially crafted traffic to cause a denial of service.
The issue affects performance in IDS mode.
Affected software
Suricata
How to mitigate CVE-2026-31933
Install security update from vendor's website.
Suricata - addressed in versions 7.0.15, 8.0.4