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Vulnerability record · CVE-2026-94083 · published 20 September 2026

CVE-2026-94083: Type confusion vulnerability

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.

9.4 CVSS 3.1 Critical EPSS 0.54% · top 56.8% CWE-843 · Type confusion Awaiting Analysis
9.4CVSS 3.1 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
22 Sep 2026Last modified by NVD

Description

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

References

LinkTags
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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-94083), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.