Description
Wazuh from 3.9.0 before 4.14.8 contains an uncontrolled YAML alias expansion vulnerability in yaml2json_node that allows a manager-controlled policy to exhaust agent memory. Attackers controlling the manager can push a small SCA policy with nested aliases via merged.mg to OOM-kill wazuh-modulesd on every agent in a group.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Wazuh | wazuh-agent | 3.9.0 – < 4.14.8 | 4.14.8 |
| Wazuh | wazuh-manager | 3.9.0 – < 4.14.8 | 4.14.8 |
Advisories 1
- WID-SEC-2026-3878 Wazuh: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 13, 2026
References
- GitHub Security Advisory (GHSA-x8v7-g49q-ff7j) vendor-advisory
- Wazuh v4.14.8 Release Notes patch release-notes
- VulnCheck Advisory: Wazuh 3.9.0 before 4.14.8 Memory Exhaustion via SCA YAML Alias Expansion third-party-advisory