CVE-2026-94083 | BDVDB-2026-377256 Detail

OISFSuricata

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact low. Attack vector: network.

Weaknesses#

CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')

References#

Exploit#

No public exploit known

History#

Version 12026-09-20Record published in the CVE List.
Version 22026-09-22Most recent update recorded in the CVE List.

Published

Published: 2026-09-20
Last modified: 2026-09-22

Vendor information

Vendor: OISF
Product: Suricata

All OISF vulnerabilities

Score

9.4 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 45.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Type Confusion

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 8.0.0 and < 8.0.7
Fixed
8.0.7

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.4 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).