What is CVE-2026-74030?

CVE-2026-74030 is a medium-severity vulnerability in Wazuh Wazuh-Agent, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 4.9/10. Published 2026-10-13.

How severe is CVE-2026-74030?

Medium severity. CVSS v3 base score is 4.9 out of 10.

XXE in Wazuh Wazuh-Agent

CVE-2026-74030

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.

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-776 — Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion)

References

github.com/wazuh/wazuh/security/advisories/GHSA-x8v7-g49q-ff7j (vendor-advisory)
github.com/wazuh/wazuh/releases/tag/v4.14.8 (release-notes, patch)
www.vulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-memory-exhaustion-via-sc… (third-party-advisory)

Frequently asked questions

What is CVE-2026-74030?: CVE-2026-74030 is a medium-severity vulnerability in Wazuh Wazuh-Agent, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 4.9/10. Published 2026-10-13.
How severe is CVE-2026-74030?: Medium severity. CVSS v3 base score is 4.9 out of 10.