CVE-2026-59786

Published Oct 5, 2026 Modified Oct 5, 2026 CWE-940

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.

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Weakness Type (CWE)

CWE-940 CWE-940

References

Frequently Asked Questions

What is CVE-2026-59786? +
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.
How do I check if I'm vulnerable to CVE-2026-59786? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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