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CVE-2026-94083

Oisf Suricata type confusion

9.4 CRITICALEPSS 0.54%
  1. Published20 Sept 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected products

Oisf Suricata< 8.0.7

Remediation

Fixed in
Oisf Suricata≥ 8.0.7

References

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Frequently asked

Is CVE-2026-94083 being actively exploited?

CVE-2026-94083 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.54%.

How severe is CVE-2026-94083?

CVE-2026-94083 has a CVSS 3.1 base score of 9.4, rated critical. EPSS estimates a 0.54% probability of exploitation.

Which products are affected by CVE-2026-94083?

Affected products include Oisf Suricata.

How do I fix CVE-2026-94083?

Upgrade affected software to a fixed version, for example Oisf Suricata 8.0.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-94083 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.