CriticalCritical vulnerability

CVE-2026-94083 (CVSS 9.4)

NVD · officialPublished Sep 20, 2026Risk 50/100EPSS 0.4%

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.

Technical details

CVSS

9.4

AV:NetworkAC:LowPR:NoneUI:NoneC:HighI:HighA:Low

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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