CVE-2026-74039

Wazuh 4.0.0 < 4.14.7 API DoS via Deeply Nested JSON auth_context

State: Published
Severity: 7.1 High
Published: Aug 18, 2026
Updated: Oct 1, 2026
Reserved: Aug 14, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	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	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling
CWE-1333 Inefficient Regular Expression Complexity

Affected Products

Product	Versions
wazuh-managerWazuh	4.0.0 to before 4.14.7Affected 5.0.0-beta2Affected

References

GitHub Security Advisory (GHSA-5vh8-34r8-q74q)vendor-advisory
Pull Requestpatch
https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-contextthird-party-advisory

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