CVE-2026-74039: Allocation of Resources Without Limits or Throttling in Wazuh wazuh-manager
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.
AI Analysis
Technical Summary
CVE-2026-74039 is a denial of service vulnerability in Wazuh wazuh-manager affecting versions >=4.0.0 <4.14.7 and =5.0.0-beta2. Authenticated attackers with allow_run_as enabled can submit arbitrarily deeply nested JSON payloads to the /security/user/authenticate/run_as API endpoint. The malformed auth_context bodies with unlimited nesting depth cause the API framework to consume excessive CPU resources, resulting in denial of service to other API consumers.
Potential Impact
The vulnerability allows authenticated attackers to exhaust CPU resources on the Wazuh manager by submitting specially crafted requests. This leads to denial of service conditions, preventing legitimate API users from accessing the service. There is no indication of data compromise or privilege escalation from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict or disable allow_run_as functionality for users who do not require it to reduce exposure. Monitor for unusual API usage patterns involving deeply nested JSON payloads.
CVE-2026-74039: Allocation of Resources Without Limits or Throttling in Wazuh wazuh-manager
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.
CVSS v4.0
Score 7.1high
Affected software
Wazuh
wazuh-manager
pkg:github/wazuh-managerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74039 is a denial of service vulnerability in Wazuh wazuh-manager affecting versions >=4.0.0 <4.14.7 and =5.0.0-beta2. Authenticated attackers with allow_run_as enabled can submit arbitrarily deeply nested JSON payloads to the /security/user/authenticate/run_as API endpoint. The malformed auth_context bodies with unlimited nesting depth cause the API framework to consume excessive CPU resources, resulting in denial of service to other API consumers.
Potential Impact
The vulnerability allows authenticated attackers to exhaust CPU resources on the Wazuh manager by submitting specially crafted requests. This leads to denial of service conditions, preventing legitimate API users from accessing the service. There is no indication of data compromise or privilege escalation from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict or disable allow_run_as functionality for users who do not require it to reduce exposure. Monitor for unusual API usage patterns involving deeply nested JSON payloads.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-14T14:06:40.512Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a849b61c6e8be03328d7583
Added to database: 08/18/2026, 17:50:25 UTC
Last enriched: 09/25/2026, 02:40:26 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 91
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