Werk #20058: HTTP proxy ignored for custom notification plug-ins configured via the REST API

Name: checkmk
Rating: 4.7 (114 reviews)

Component

Notifications

Title

HTTP proxy ignored for custom notification plug-ins configured via the REST API

Date

Jul 8, 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
2.5.0p9	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

When a notification rule for a custom notification plug-in (for example a plug-in installed via an MKP) was created through the REST API, a configured HTTP proxy was silently ignored when the notification was sent. Affected plug-ins fell back to a direct connection, so notifications could fail to reach external services in environments that require a proxy to leave the network.

The same rule configured through the setup GUI was not affected.

The configured HTTP proxy is now honored for these notification rules. This also applies to rules that were already created before this fix: they are evaluated correctly when the notification is sent, so they do not need to be re-saved.

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