CVE-2026-74039 PUBLISHED

Wazuh 4.0.0 < 4.14.7 API DoS via Deeply Nested JSON auth_context

Assigner: VulnCheck
Reserved: 14.08.2026 Published: 18.08.2026 Updated: 18.08.2026

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.

CVSS 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
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Wazuh
Product	wazuh-manager
Versions	Default: unaffected affected from 4.0.0 to 4.14.7 (excl.) Version 5.0.0-beta2 is affected

Solutions

Upgrade the affected package to 4.14.7 or later.

Credits

APhuongKMA reporter
jepalfer remediation developer

References

Problem Types

Allocation of Resources Without Limits or Throttling CWE
Inefficient Regular Expression Complexity CWE