What is CVE-2026-31934?

CVE-2026-31934 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-2026-31934?

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

Vulnerability in Oisf Suricata

CVE-2026-31934

Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, there is a quadratic complexity issue when searching for URLs in mime encoded messages over SMTP leading to a performance impact. This issue has bee…

EPSS: 0.001 (17.8th 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 >= 8.0.0, < 8.0.4

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

https://github.com/OISF/suricata/security/advisories/GHSA-hr89-h2pp-f3c8 (x_refsource_CONFIRM)
https://redmine.openinfosecfoundation.org/issues/8292 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-31934?: CVE-2026-31934 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-2026-31934?: High severity. CVSS v3 base score is 7.5 out of 10.