---
id: CVE-2026-46387
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,
  Suricata's HTTP/2 decompression path could grow the decompressed response-body
  buff…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-409
vendor: OISF
product: suricata
affected:
  - suricata < 7.0.16
  - 'suricata >= 8.0.0, < 8.0.5'
published: '2026-09-10'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T19:54:25.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46387'
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-45p7-j5wm-8wrx'
    label: security-advisories@github.com
  - url: 'https://redmine.openinfosecfoundation.org/issues/8513'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-10T14:57:43.324169Z'
ingestedAt: '2026-09-14T15:13:34.751Z'
epss: 0.00736
epssPercentile: 0.52463
---

## 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, Suricata's HTTP/2 decompression path could grow the decompressed response-body buffer without an effective upper bound. A crafted HTTP/2 DATA payload using a high compression ratio, such as gzip, deflate, or brotli compressed data, could cause Suricata to allocate excessive memory while decompressing the payload. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.