What is CVE-2026-31933?

CVE-2026-31933 is a high-severity vulnerability in Oisf Suricata, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-04-02.

How severe is CVE-2026-31933?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Oisf Suricata

CVE-2026-31933

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.

EPSS: 0.000 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Oisf Suricata — versions < 7.0.15, >= 8.0.0, < 8.0.4

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

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

Frequently asked questions

What is CVE-2026-31933?: CVE-2026-31933 is a high-severity vulnerability in Oisf Suricata, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-04-02.
How severe is CVE-2026-31933?: High severity. CVSS v3 base score is 7.5 out of 10.