CVE-2026-23934 - Frontend DoS via the validate.api.exists action

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MEDIUM

Frontend DoS via the validate.api.exists action

Published Aug 18, 2026

5.1

MEDIUM

CVSS 4.0

EPSS 0.36%

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.

Affected products

Vendor Zabbix Product Zabbix Default
n/a
- Version
  7.4.0
  Status
  affected
  Constraints
  <=7.4.11

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Zabbix

n/a

Version	Status	Constraints
7.4.0	affected	<=7.4.11

Remediation

Vendor solution

Update the affected components to their respective fixed versions.

Weaknesses (1)

CWE-405

References (1)

https://support.zabbix.com/browse/ZBX-28072

Link	Providers	Tags
https://support.zabbix.com/browse/ZBX-28072

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner Zabbix

Published Aug 18, 2026

Updated Aug 18, 2026

Reserved Jan 19, 2026

Link CVE-2026-23934

CISA Vulnrichment

Updated Aug 18, 2026

NVD

Status Analyzed

Modified Sep 23, 2026

Link CVE-2026-23934

Red Hat

Severity n/a

Public date n/a

Links CVE-2026-23934