Werk #22128: Fix crash on User messages page with older messages

Component

User interface

Title

Fix crash on User messages page with older messages

Date

Aug 17, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

3.0.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p12 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p36 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Opening User messages could fail with a crash report showing TypeError: '<' not supported between instances of 'NoneType' and 'bool', leaving the page empty.

This happened as soon as one of the stored messages predated the distinction between normal and security messages. Such a message carries no security flag, and sorting it together with newer messages that do carry one failed.

Messages without a security flag are now sorted as normal messages, and the page lists all messages again.

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