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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-2859

Unauthenticated Host Enumeration via Observable Response Discrepancy on Deploy Agent Endpoint

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Status
Published
Published
Updated
Assigning organization
Checkmk

Description

Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows unauthenticated users to enumerate existing hosts by observing different HTTP response codes in deploy_agent endpoint, which could lead to information disclosure.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Checkmk GmbH Checkmk

Default version status: unaffected

  • 2.4.0 to < 2.4.0p23affected
  • 2.3.0 to < 2.3.0p43affected
  • 2.2.0affected

References