Werk #19782: show_host endpoint: use contact groups

Component	REST API
Title	show_host endpoint: use contact groups
Date	Apr 15, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.6.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p29 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

When trying to show information of a specific host with the

GET /objects/host_config/{host_name}

endpoint, you had to have the See all hosts and folders permission.

This was not aligned with the

GET /domain-types/host_config/collections/all

where all of the contact hosts have been shown.

Now the permission handling correctly uses contact groups: a user can view a host if they are a contact of the host itself or of the folder containing it.

To the list of all Werks