Werk #19818: Fix unusable "Host/Service check command (regex)" filter

Component	User interface
Title	Fix unusable "Host/Service check command (regex)" filter
Date	May 5, 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 2.5.0p2 Not yet released 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 2.3.0p47 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

The filters Host check command (regex) and Service check command (regex) were rendered as a dropdown that auto-completed against existing check command names by literal substring match. As soon as a user typed a regular expression containing a metacharacter (for example check.*), the dropdown showed No results found and the regex could not be applied.

The filters now provide a plain text input, matching all other regular expression filters. Users who want to pick from the list of existing check commands can use the corresponding (exact match) filters introduced with werk #17926.

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