What’s Vulnerable › Vulnerabilities

CVE-2026-74030: Wazuh 3.9.0 before 4.14.8 Memory Exhaustion via SCA YAML Alias Expansion

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-13 · updated 2026-10-13
• Weakness: CWE-776

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

• wazuh: from 3.9.0 before 4.14.8 — fixed in 4.14.8
• wazuh-agent: from 3.9.0 before 4.14.8 — fixed in 4.14.8

How to fix

Upgrade to a fixed version: wazuh 4.14.8; wazuh-agent 4.14.8. Check the vendor advisory for mitigations.

References

• https://github.com/wazuh/wazuh/releases/tag/v4.14.8
• https://github.com/wazuh/wazuh/security/advisories/GHSA-x8v7-g49q-ff7j
• https://www.vulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-memory-exhaustion-via-sca-yaml-alias-expansion

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