---
id: CVE-2026-45764
title: >-
  Suricata is a network Intrusion Detection System, Intrusion Prevention System
  and Network Security Monitoring engine
summary: >-
  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 S…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-843
vendor: oisf
product: suricata
affected:
  - 'suricata >= 7.0.0, < 7.0.16'
  - 'suricata >= 8.0.0, < 8.0.5'
patched:
  - suricata 8.0.5
published: '2026-09-10'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:17:56.497'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45764'
references:
  - url: 'https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/security/advisories/GHSA-5rvq-72r5-rqhr'
    label: security-advisories@github.com
  - url: 'https://redmine.openinfosecfoundation.org/issues/8492'
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45764.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-45764'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-45764'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45764'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00633
epssPercentile: 0.48059
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-11T15:12:01.089283Z'
scores:
  nvd: 9.1
  vendor: 7.5
ingestedAt: '2026-09-12T16:30:34.774Z'
---

## Overview

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

- `suricata >= 7.0.0, < 7.0.16`
- `suricata >= 8.0.0, < 8.0.5`

## Remediation

Upgrade past the affected range:

- `suricata 8.0.5`

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45764.json)