by Kastro
Paper/Archive/CVE-2026-45764

CVE-2026-45764

OISF suricata — Suricata http2: protocol-change type confusion can lead to denial of service

EPSS 0.6%CVSS 9.1
critical.is priorityof 100
37
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 50.4.504 × 2010.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.

Affected

ProductAffectedFixed inSource
suricata>= 8.0.0, < 8.0.5–CNA
suricata< 7.0.16–CNA

Scores by source

GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refgithub.com/OISF/suricata/security/advisories/GHSA-5rvq-72r5-rqhrrefforum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315refredmine.openinfosecfoundation.org/issues/8492