---
id: CVE-2026-74030
title: >-
  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
summary: >-
  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 w…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-776
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T17:17:45.260'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74030'
references:
  - url: 'https://github.com/wazuh/wazuh/releases/tag/v4.14.8'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-x8v7-g49q-ff7j'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-memory-exhaustion-via-sca-yaml-alias-expansion
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-13T14:29:01.859Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.