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

Quick assessment

Affected
Wazuh wazuh-agent
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wazuh 从 3.9.0 到 4.14.8 版本之前存在一个不受控制的 YAML 别名扩展漏洞，该漏洞位于 组件中。此漏洞允许由管理器控制的策略耗尽代理程序的内存。通过向组内所有代理程序推送一个包含嵌套别名的小型 SCA（系统配置评估）策略（经由 文件），攻击者在控制管理器的情况下可以导致 进程在每个代理程序上因内存耗尽（OOM）而被终止。

CVSS 4.9 · Medium

Affected Version Matrix 4

VendorProduct Version RangeStatus
Wazuh wazuh-agent 3.9.0< 4.14.8 affected
4.14.8 unaffected
Wazuh wazuh-manager 3.9.0< 4.14.8 affected
4.14.8 unaffected
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I. Basic Information for CVE-2026-74030

Vulnerability Information
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Vulnerability Title
Wazuh 3.9.0 before 4.14.8 Memory Exhaustion via SCA YAML Alias Expansion
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
DTD中递归实体索引的不恰当限制(XML实体扩展)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wazuh wazuh-agent 3.9.0 ~ 4.14.8 -
Wazuh wazuh-manager 3.9.0 ~ 4.14.8 -

II. Public POCs for CVE-2026-74030

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III. Intelligence Information for CVE-2026-74030

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Vendor Advisories for CVE-2026-74030 (2)

Vendor Pages for CVE-2026-74030 (1)

Same Patch Batch · Wazuh · 2026-10-13 · 15 CVEs total

CVE-2026-74041 9.1 CRITICAL Wazuh 4.14.3 before 4.14.8 Remote Command Validation Bypass via Case Mismatch
CVE-2026-74040 9.1 CRITICAL Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker
CVE-2026-74043 9.0 CRITICAL Wazuh 4.1.1 before 4.14.8 Path Traversal via Cluster Upload Functions
CVE-2026-74034 7.5 HIGH Wazuh 4.1.0 before 4.14.8 Arbitrary File Read via upgrade_custom Command
CVE-2026-74036 7.2 HIGH Wazuh 4.3.0 before 4.14.8 Remote Code Execution via SCA Command Policies
CVE-2026-74037 7.2 HIGH Wazuh 4.0.0 before 4.14.8 Session Invalidation Bypass in check_token
CVE-2026-74035 7.2 HIGH Wazuh 4.6.0 before 4.14.8 Authentication Bypass via Empty Password in update_user
CVE-2026-74045 7.1 HIGH Wazuh 3.12.0 before 4.14.8 Heap Buffer Overflow in wazuh-analysisd FIM Decoder
CVE-2026-74047 6.5 MEDIUM Wazuh 4.0.0 before 4.14.8 authd.pass Disclosure via Agent 000 Config Endpoint
CVE-2026-74031 6.5 MEDIUM Wazuh 4.1.1 before 4.14.8 Path Traversal File Deletion via Rule/Decoder Delete Helpers
CVE-2026-74033 6.1 MEDIUM Wazuh from 4.1.1 before 4.14.8 Path Traversal in CDB List Cluster Handlers
CVE-2026-93346 5.3 MEDIUM Wazuh 4.0.0 before 4.14.8 API Brute-Force Protection Bypass via Race Condition
CVE-2026-93347 4.9 MEDIUM Wazuh 4.1.1 before 4.14.8 Path Traversal via Cluster get_list_file
CVE-2026-74032 4.3 MEDIUM Wazuh 4.0.0 before 4.14.8 RBAC Authorization Bypass via /security/actions

IV. Related Vulnerabilities

Same product: wazuh-agent
Same vendor: Wazuh
Same weakness: CWE-776

V. Comments for CVE-2026-74030

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