Werk #19043: Crash when displaying rules with wildcard host name conditions

Component	Setup
Title	Crash when displaying rules with wildcard host name conditions
Date	Mar 16, 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 Ultimate MT 2.5.0b2 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.4.0p25 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.3.0p46 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

The rule listing page in Setup crashed with a ValueError: Invalid hostaddress error when displaying rules that contained explicit host name conditions using wildcard characters (e.g. AP-SEDE-TCOTILLAS*).

This issue has been fixed. Such host specifications are now rendered as plain text, preventing the crash.

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