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CVE-2026-74039— Wazuh 4.0.0 < 4.14.7 API DoS via Deeply Nested JSON auth_context

Quick assessment

Affected
Wazuh wazuh-manager
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是美国Wazuh公司开源的一款安全检测与威胁分析平台。 Wazuh 4.0.0至4.14.7之前版本和5.0.0-beta2版本存在资源管理错误漏洞，该漏洞源于向POST /security/user/authenticate/run_as端点提交任意深度嵌套的JSON结构，可能导致经过身份验证的攻击者（启用allow_run_as）耗尽CPU资源，造成拒绝服务。

CVSS 6.5 · Medium EPSS 0.29% · P22

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
Wazuh wazuh-manager 4.0.0< 4.14.7 affected
5.0.0-beta2 affected
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I. Basic Information for CVE-2026-74039

Vulnerability Information
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Vulnerability Title
Wazuh 4.0.0 < 4.14.7 API DoS via Deeply Nested JSON auth_context
Source: CVE Program / CVE List V5
Vulnerability Description
Wazuh 4.0.0 before 4.14.7 and 5.0.0-beta2 contain a denial of service vulnerability that allows authenticated attackers with allow_run_as enabled to exhaust CPU resources by submitting arbitrarily deeply nested JSON structures to the POST /security/user/authenticate/run_as endpoint. Attackers can repeatedly submit malformed auth_context bodies with unlimited nesting depth to cause the API framework to consume excessive CPU, denying service to all other API consumers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Wazuh 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wazuh是美国Wazuh公司开源的一款安全检测与威胁分析平台。 Wazuh 4.0.0至4.14.7之前版本和5.0.0-beta2版本存在资源管理错误漏洞，该漏洞源于向POST /security/user/authenticate/run_as端点提交任意深度嵌套的JSON结构，可能导致经过身份验证的攻击者（启用allow_run_as）耗尽CPU资源，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wazuh wazuh-manager 4.0.0 ~ 4.14.7 -

II. Public POCs for CVE-2026-74039

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III. Intelligence Information for CVE-2026-74039

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Patches & Fixes for CVE-2026-74039 (1)

Vendor Advisories for CVE-2026-74039 (2)

Same Patch Batch · Wazuh · 2026-08-18 · 4 CVEs total

CVE-2026-74038 7.1 HIGH Wazuh 4.0.0 < 4.14.6 Path Traversal DoS via Agent Enrollment
CVE-2026-74044 6.5 MEDIUM Wazuh 4.0.0 < 4.14.6 Path Traversal Arbitrary Directory Deletion via Cluster Hello
CVE-2026-74046 4.9 MEDIUM Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb

IV. Related Vulnerabilities

Same product: wazuh-manager
Same vendor: Wazuh
Same weakness: CWE-770

V. Comments for CVE-2026-74039

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