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TI-2026-63303 Aliases CVE-2026-94083GHSA-4wwf-734g-mqm8

Type confusion in OISF Suricata

Priority MEDIUM 49CWE-843Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-843 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0054 45th percentileScored 2026-11-07
Fix Fixed Suricata (OISF): 8.0.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OISFSuricata8.0.0 to before 8.0.78.0.7Patch availableCNA
  • Suricata VendorOISF Affected 8.0.0 to before 8.0.7 Fixed in 8.0.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*before 8.0.7VulnerableOISF
  • cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* Versions before 8.0.7 Vulnerable ·OISF

Remediation

  • Fix · CNA Suricata (OISF) Fixed in 8.0.7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OISF Suricata 8.0.7

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    Show all 2 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-94083
  2. 2026-10-03 Alias added: GHSA-4wwf-734g-mqm8

References

Patch 1

Other 2

  • TI-2026-33506 ikev2: unbounded client transform storage can lead to resource exhaustion CVSS 3.1HIGH 7.5
  • TI-2026-33484 Suricata lua/tls: null dereference in TlsGetCertInfo CVSS 3.1HIGH 7.5
  • TI-2024-31811 Suricata ja4: invalid alpn leads to panic CVSS 3.1HIGH 7.5
  • TI-2020-13673 Directory Traversal vulnerability found in Pfsense v.2.1.3 and Pfsense Suricata v.1.4.6… CVSS 3.1HIGH 7.5
  • TI-2023-17928 In Suricata before 6.0.13, an adversary who controls an external source of Lua rules may… CVSS 3.1CRITICAL 9.8
  • TI-2026-63304 Use after free in OISF Suricata CVSS 3.1CRITICAL 9.4
See all 99 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences