CVE-2026-31931
7.5
HIGH
CVSS 3.1
EPSS 0.02%
Description
Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the "tls.alpn" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.
How to fix CVE-2026-31931
To remediate CVE-2026-31931, upgrade the affected package to a fixed version below.
- Debian/suricata—upgrade to 1:8.0.4-1 or later
Is CVE-2026-31931 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:8.0.4-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |