CVE-2026-23934
Received Received - Intake

Frontend Webserver CPU Exhaustion via Validate API Requests

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Zabbix

Description
An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-23934
EUVD
EUVD-2026-60738

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
zabbix zabbix *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-405 The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."

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Executive Summary

This vulnerability allows an authenticated user to send specially crafted requests to the Frontend validate.api.exists action, causing excessive CPU usage on the webserver. This can lead to a denial of service condition where the server becomes unresponsive or slows down significantly.

Detection Guidance

Monitor CPU usage on the Frontend webserver during request processing. Check for unusually high CPU load from the validate.api.exists action. Use system monitoring tools like top, htop, or sar to observe CPU spikes during request bursts.

Impact Analysis

If exploited, this vulnerability can degrade system performance, disrupt services, or make the webserver unavailable to legitimate users. It may also require additional resources to mitigate the impact.

Compliance Impact

This vulnerability could impact compliance with GDPR and HIPAA by enabling denial of service attacks that disrupt system availability. GDPR requires maintaining service availability, while HIPAA mandates ensuring access to protected health information systems. A DoS condition may violate these requirements.

Mitigation Strategies

Restrict access to the validate.api.exists action endpoint. Implement rate limiting on the Frontend server. Update Zabbix to the latest patched version if available. Monitor and log requests to this endpoint for suspicious activity.

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