CVE-2026-94083CWE-843

CVE-2026-94083

Critical · published September 20, 2026

CVSS v3.1
9.4
EPSS
1%
Percentile
44.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00540 · 44.6th percentile
Weakness
CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')
Published
2026-09-20T06:16Z
Affected products (1)
ProductVersionsFixed in
oisf/suricata< 8.0.78.0.7
References (3)
https://forum.suricata.io/t/suricata-8-0-7-released/6467 · [email protected]https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074 · [email protected]https://github.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7 · [email protected]
EPSS history
Timeline
  • 21 SEP 03:37Z
    EPSS moved — → 0%
    epss
  • 20 SEP 01:18Z
    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…
    cvelistv5