Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck
CVE-2026-74030Wazuh 3.9.0 before 4.14.8 Memory Exhaustion via SCA YAML Alias Expansion
Medium 4.9
In plain English
A medium-severity security flaw in wazuh-agent from Wazuh. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Severity (CVSS 3.1)4.9Medium
Exploit odds (30 days)0.4%top 65.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wazuh | wazuh-agent | 3.9.0 – before 4.14.8 |
| Wazuh | wazuh-manager | 3.9.0 – before 4.14.8 |
Weakness: CWE-776 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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