Deserialization Vulnerability in Wazuh Affects Cluster API Functionality
CVE-2026-28220

8.4HIGH

Key Information:

Vendor

Wazuh

Status
Wazuh
Vendor
CVE Published:
20 July 2026

What is CVE-2026-28220?

Wazuh, a free and open-source security platform, is vulnerable due to issues in its Cluster Distributed API (DAPI) handling. Before version 4.14.5, an authenticated cluster peer could exploit the platform's deserialization process to execute attacker-controlled callables, leading to unauthorized privileged actions on the master node. This vulnerability allows file manipulation, user creation, and modifications to critical configurations. It arises from the improper handling of JSON deserialization, combined with the misuse of global RBAC contexts, resulting in a potential complete compromise of the Wazuh manager.

Affected Version(s)

wazuh >= 4.0.0, < 4.14.5

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-w...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.