CVE-2026-74039

Wazuh 4.0.0 < 4.14.7 API DoS via Deeply Nested JSON auth_context

Published Aug 18, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Upgrade the affected package to 4.14.7 or later.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:wazuh:wazuh:5.0.0-beta2:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Wazuh wazuh
CPEs cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*
cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:wazuh:wazuh:5.0.0:beta2:*:*:*:*:*:*
Vendors & Products Wazuh wazuh
Type Values Removed Values Added
First Time appeared Wazuh
Wazuh wazuh-manager
Vendors & Products Wazuh
Wazuh wazuh-manager
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Wazuh 4.0.0 < 4.14.7 API DoS via Deeply Nested JSON auth_context
Weaknesses CWE-1333
CWE-770
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 1, 2026, 3:20 PM
Reserved
Aug 14, 2026, 2:06 PM
Status
Analyzed
Published
Aug 18, 2026, 6:19 PM
Modified
Oct 22, 2026, 10:10 PM