Vulnerability · Published Aug 1, 2026 · Assigned by VulnCheck

CVE-2026-67307Wazuh before 5.0.0-beta3 Cluster Attribution Spoofing via Inventory Sync

Medium 6.3

In plain English

A medium-severity insufficient verification of data authenticity in wazuh from wazuh. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.2%top 86.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
wazuh	wazuh	0 – before 5.0.0-beta3

Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N

References

GitHub Security Advisory (GHSA-jv5p-fhwh-9w55) vendor-advisory
Patch Commit patch
VulnCheck Advisory: Wazuh before 5.0.0-beta3 Cluster Attribution Spoofing via Inventory Sync third-party-advisory