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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (38.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Oisf Suricata — versions < 7.0.15, >= 8.0.0, < 8.0.4
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-hvp5-gpr6-j4gp (Vendor Advisory)
- redmine.openinfosecfoundation.org/issues/8272 (Permissions Required, Issue Tracking)
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.