CVE-2026-31933 PUBLISHED

Suricata stream: quadratic complexity in stream inspection

Assigner: GitHub_M
Reserved: 10.03.2026 Published: 02.04.2026 Updated: 02.04.2026

Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, specially crafted traffic can cause Suricata to slow down, affecting performance in IDS mode. This issue has been patched in versions 7.0.15 and 8.0.4.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	OISF
Product	suricata
Versions	Version < 7.0.15 is affected Version >= 8.0.0, < 8.0.4 is affected

References

https://github.com/OISF/suricata/security/advisories/GHSA-hvp5-gpr6-j4gp
https://redmine.openinfosecfoundation.org/issues/8272

Problem Types

CWE-407: Inefficient Algorithmic Complexity CWE