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CVE-2026-94083

CRITICAL
9.4
CVSS Score
Published: September 20, 2026 at 01:18 AM UTC
Updated: September 28, 2026 at 06:30 PM UTC
1 product affected across 1 vendorSuricata

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Severity
CRITICAL9.4
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Suricata· Oisf
95%
v < 8.0.78.0.0 ≤ v < 8.0.78.0.0
Affected range stops below 8.0.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Release Notes
Source: cverecord
https://forum.suricata.io/t/suricata-8-0-7-released/6467
Patch
Source: cverecord
https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074
Release Notes
Source: cverecord
https://github.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.4CRITICALmitre
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-843

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