CVE-2026-74030 Wazuh 3.9.0 before 4.14.8 Memory Exhaustion via SCA YAML Alias Expansion
Attackers controlling the Wazuh manager can exhaust agent memory via malicious YAML policies, causing denial of service on agents.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-74030?
CVE-2026-74030 is a medium-severity denial of service vulnerability in wazuh-agent, published on 13 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
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.
Weakness: CWE-776
Which versions are affected by CVE-2026-74030?
How do I fix CVE-2026-74030?
No fix has been published for CVE-2026-74030 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-74030 being exploited?
There is no known exploitation of CVE-2026-74030 in the wild and no public exploit code.
Sources
Also known as GHSA-x8v7-g49q-ff7j.