CVE-2026-31933: Oisf Suricata

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Oisf Suricata: before 7.0.15 (fixed in 7.0.15); from 8.0.0, before 8.0.4 (fixed in 8.0.4)

Published 2026-04-02. Last modified 2026-06-17.