CVE-2026-74030Public exploitNetwork attack vectorHinoki check available

Memory exhaustion via unchecked SCA YAML alias expansion

Published Oct 13, 2026 · Updated Oct 13, 2026

Memory exhaustion in Wazuh agent SCA before 4.14.8 allows remote authenticated users to crash wazuh-modulesd via manager-pushed YAML. The yaml2json_node converter repeatedly allocates fresh JSON subtrees for referenced aliases without limiting expansion, turning a small policy into excessive memory use. Attackers must control the manager and deliver an enabled policy; parsing precedes rule evaluation, so sca.remote_commands restrictions do not prevent the agent-group denial of service.

CVSS severity4.9
Medium
EPSS probability0.40%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Memory exhaustion in Wazuh agent SCA before 4.14.8 allows remote authenticated users to crash wazuh-modulesd via manager-pushed YAML. The yaml2json_node converter repeatedly allocates fresh JSON subtrees for referenced aliases without limiting expansion, turning a small policy into excessive memory use. Attackers must control the manager and deliver an enabled policy; parsing precedes rule evaluation, so sca.remote_commands restrictions do not prevent the agent-group denial of service.

The record

CVE
CVE-2026-74030
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Wazuh
Product
Wazuh agent
Classifications
CWE-776, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.9.0 <4.14.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Wazuh · Wazuh agentversion=3.9.0 <4.14.8
Wazuh · Wazuh managerversion=3.9.0 <4.14.8

Published CVSS scores

4.9WazuhCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
T1499.004Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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