---
id: CVE-2026-45768
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. Starting in version 8.0.0 and prior to
  version 8.0.5, LDAP transaction state could store an unbounded number of
  respons…
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-400
  - CWE-770
vendor: oisf
product: suricata
affected:
  - 'suricata >= 8.0.0, < 8.0.5'
patched:
  - suricata 8.0.5
published: '2026-09-10'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T18:31:31.260'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45768'
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-cr4x-w4c4-57p7'
    label: security-advisories@github.com
  - url: 'https://redmine.openinfosecfoundation.org/issues/8405'
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45768.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-45768'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-45768'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45768'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00484
epssPercentile: 0.40844
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-11T16:34:28.761489Z'
ingestedAt: '2026-09-14T11:11:19.881Z'
---

## Overview

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, LDAP transaction state could store an unbounded number of responses. Because LDAP can be processed over UDP, crafted traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Version 8.0.5 contains a fix. As a workaround, disable LDAP application-layer parsing where it is not required. Alternatively, use a rule like `alert ldap any any -> any any (sid: 1; ldap.responses.count: >1024; bypass;)`.

## Affected

- `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-2026-45768.json)