CVE-2026-31933

HIGH

Suricata stream: quadratic complexity in stream inspection

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2
Core References
X_Refsource_Misc x_refsource_misc
https://redmine.openinfosecfoundation.org/issues/8272

Scores

CVSS v3 7.5
EPSS 0.0035
EPSS Percentile 26.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-407
Status published
Products (3)
oisf/suricata < 7.0.15
OISF/suricata < 7.0.15
OISF/suricata >= 8.0.0, < 8.0.4
Published Apr 02, 2026
Tracked Since Apr 02, 2026