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TI-2026-67602 Aliases CVE-2026-59786GHSA-jmxh-h64m-45qp

Zabbix accepts unauthenticated active agent heartbeat messages

Priority LOW 36CWE-940Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Zabbix Server and Proxy from 7.0.0 through 7.0.28 and from 7.4.0 through 7.4.12 accept active agent heartbeat messages without checking the configured PSK or certificate authentication. A remote attacker who can reach the Zabbix trapper port can report any host as available, which affects integrity (CWE-940).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00203 10th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

Remediation

The sources list no fixed version for Zabbix.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-05 Threatist record created from CVE-2026-59786
  2. 2026-10-05 Alias added: GHSA-jmxh-h64m-45qp
  3. 2026-10-06 Affected versions changed · Red Hat
  4. 2026-10-06 CVSS score added · Red Hat

References

Other 1

  • TI-2022-07300 Authentication bypass by spoofing in Zabbix Frontend KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-28315 SQL injection in user.get API CVSS 3.1CRITICAL 9.9
  • TI-2016-08210 SQL injection vulnerability in Zabbix before 2.2.14 and 3.0 before 3.0.4 allows remote… CVSS 3.0CRITICAL 9.8
  • TI-2013-04884 Multiple SQL injection vulnerabilities in Zabbix 1.8.x before 1.8.18rc1, 2.0.x before 2.0.9rc1, and 2.1.x before 2.1.7. CVSS 3.1CRITICAL 9.8
  • TI-2022-21297 X-Forwarded-For header is active by default causes access to Zabbix sites in maintenance mode CVSS 3.1CRITICAL 9.8
  • TI-2022-07303 Possible view of the setup pages by unauthenticated users if config file already exists KEVCVSS 3.1MEDIUM 5.3
See all 144 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences