CVE-2026-94083 Suricata - Denial of Service

Suricata < 8.0.7 contains a type confusion caused by improper cleanup of HTTP2 state during DoH2 requests with HTTP1 to HTTP2 upgrade, letting attackers cause denial of service, exploit requires app-layer.protocols.doh2 enabled.

CVSS base score 9.4 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.54% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Published
20 September 2026
Updated
15 October 2026
Weakness
CWE-843

Vendor fix

Update to version 8.0.7 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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