Description
Zabbix Server and Proxy accept the active agent heartbeat message regardless of the configured PSK or certificate authentication. This means someone with access to the Zabbix trapper port can report an arbitrary host using an active agent as available, resulting in a loss of integrity.
Published: 2026-10-05
Score: 6.9 Medium
EPSS: n/a
KEV: No
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Remediation

Vendor Solution

Update the affected components to their respective fixed versions.

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History

Mon, 05 Oct 2026 10:45:00 +0000

Type Values Removed Values Added
Description Zabbix Server and Proxy accept the active agent heartbeat message regardless of the configured PSK or certificate authentication. This means someone with access to the Zabbix trapper port can report an arbitrary host using an active agent as available, resulting in a loss of integrity.
Title Active agent heartbeat missing TLS check
Weaknesses CWE-940
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: Zabbix

Published:

Updated: 2026-10-05T10:29:01.810Z

Reserved: 2026-07-07T08:30:49.860Z

Link: CVE-2026-59786

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses
  • CWE-940

    Improper Verification of Source of a Communication Channel