Werk #19239: Synthetic Monitoring: Ship RCC built with Go 1.26 to address CVE-2025-68121

Component

Agent bakery

Title

Synthetic Monitoring: Ship RCC built with Go 1.26 to address CVE-2025-68121

Date

May 19, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p4	Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p30	Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

This werk only affects users of Synthetic Monitoring.

The RCC binaries (Linux/Windows) shipped with the Synthetic Monitoring feature are now built with Go 1.26 to address CVE-2025-68121. Checkmk was NOT affected by this vulnerability.

Users must update the agent on affected hosts to receive the fix.

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