High severity · published Aug 1, 2026
CVE-2026-67307
Wazuh before 5.0.0-beta3 Cluster Attribution Spoofing via Inventory Sync
7.7
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WA
wazuh · wazuh
before 5.0.0-beta3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67307
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-67307
Patch
https://github.com/wazuh/wazuh/commit/b3dae02ec9ddcfd449cb61b4c76d180e3e43f79a
Exploit
https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5p-fhwh-9w55
Exploit
https://www.vulncheck.com/advisories/wazuh-before-beta3-cluster-attribution-spoofing-via-inventory-sync
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