Critical severity · published Sep 20, 2026
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…
9.4
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
Suricata · OISF
8.0.0 before 8.0.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-94083
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-94083
Release Notes
https://forum.suricata.io/t/suricata-8-0-7-released/6467
Patch
https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074
Release Notes
https://github.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7
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