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Werk #18987: Fix crash in global rule search when rule contains invalid regex

Component Setup
Title Fix crash in global rule search when rule contains invalid regex
Date Mar 10, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.6.0b1
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.5.0b1
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p25
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p46
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Rule search previously crashed when encountering a rule with an invalid regular expression, resulting in no search results and no indication of the cause. Now, if an invalid regular expression is detected, a warning is displayed that identifies the offending rule and ruleset, including direct links to each, and the search continues with the remaining rules.

When you see a warning about an invalid regular expression, please review and edit the indicated rule to correct the regex. This ensures that future searches will include all relevant results.

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