On-Premise Callback 9.5.7 release notes

Released on November 26, 2025

Release highlights

Dependency upgrades

We have upgraded the following dependencies to the new versions listed below:

  • Ruby 3.3.8
  • Erlang 27
  • RabbitMQ 4.1.0
  • .NET Core 8.0

RabbitMQ log rolling will now be enabled by default.

The On-Premise Callback 9.5.7+ installer will configure RabbitMQ log rolling automatically, and you can adjust the configuration manually afterward, as needed. The default configuration will create five rolling log files with a maximum size of 10 MiB each.

We continue to make security enhancements throughout the application.

These updates will continue to maintain compliance with modern security standards.

Resolved issues

An issue causing the Management API not to start up has been resolved.

If the VHT_Management_API service stopped unexpectedly, it could result in invalid data in the LicenseGatewayInfo.dat file. This in turn could cause the next attempted startup of the service to fail.

We have updated the startup exception handling to ensure the service starts as expected in this scenario.

Smart Rules will now adjust for Daylight Savings Time (DST) automatically.

Previously, Smart Rules could execute in the wrong time range if DST was in effect in the server's time zone. Now, Smart Rules will use a DST offset when appropriate.