CVE-2026-74039

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 4.0

7.1CVSS: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 3.1

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

EPSS

0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-25)

CWEs

CWE-770, CWE-1333

Published

2026-08-18

Modified

2026-10-22

Record from

the NVD, synced 2026-10-23

Affected

• wazuh:wazuh

References

• https://github.com/wazuh/wazuh/pull/37034
• https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q
• https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-context
• https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q

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