What is CVE-2026-94083?

CVE-2026-94083 is a critical-severity vulnerability in Oisf Suricata, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.4/10. Published 2026-09-20.

How severe is CVE-2026-94083?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Vulnerability in Oisf Suricata

CVE-2026-94083

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.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

Affected products

Oisf Suricata

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-94083?: CVE-2026-94083 is a critical-severity vulnerability in Oisf Suricata, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.4/10. Published 2026-09-20.
How severe is CVE-2026-94083?: Critical severity. CVSS v3 base score is 9.4 out of 10.