CVE-2026-94083

9.4 criticalEPSS 0.5%

Critical (9.4) in oisf suricata. EPSS 0.5% chance of exploitation in the next 30 days.

Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state is executed even though the actual state is HTTP1 (when there is a DoH2 request with an HTTP1 to HTTP2 upgrade). This requires app-layer.protocols.doh2 to be enabled, which is the default in 8.x versions.

Severity

CVSS 3.1

9.4 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
CWE: CWE-843
Published: 2026-09-20
Modified: 2026-09-28
Record from: the NVD, synced 2026-10-19

Affected

oisf:suricata

References

https://forum.suricata.io/t/suricata-8-0-7-released/6467
https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074
https://github.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7

Check your stack JSON