---
id: CVE-2026-67307
title: >-
  Wazuh 5.0.0-beta1 (fixed in 5.0.0-beta3) does not validate or override the
  cluster_name and cluster_node fields in inventory-sync Start FlatBuffer
  messages, while validating only the agentid against the authenticated agent
  identity
summary: >-
  Wazuh 5.0.0-beta1 (fixed in 5.0.0-beta3) does not validate or override the
  cluster_name and cluster_node fields in inventory-sync Start FlatBuffer
  messages, while validating only the agentid against the authenticated agent
  identity. This…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N'
cwe:
  - CWE-345
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67307'
references:
  - url: >-
      https://github.com/wazuh/wazuh/commit/b3dae02ec9ddcfd449cb61b4c76d180e3e43f79a
    label: disclosure@vulncheck.com
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5p-fhwh-9w55'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wazuh-before-beta3-cluster-attribution-spoofing-via-inventory-sync
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-02T07:18:01.601Z'
epss: 0.00194
epssPercentile: 0.094
---

## Overview

Wazuh 5.0.0-beta1 (fixed in 5.0.0-beta3) does not validate or override the cluster_name and cluster_node fields in inventory-sync Start FlatBuffer messages, while validating only the agentid against the authenticated agent identity. This allows a low-privileged enrolled agent to spoof cluster attribution in indexed inventory and vulnerability documents by forging wazuh.cluster.name values and influencing the document _id prefix, potentially tampering with inventory records or, in shared-indexer multi-cluster deployments, poisoning another cluster's records when numeric agent IDs collide.

## Remediation

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