Google Tag Manager October 2026 updates: new server image and 7x more space

Google Tag Manager has introduced two updates for server-side tracking: 

• a new server image version with security updates 
• a significant increase in configuration capacity for server-side GTM containers

Here's what's changed and what it means for your tracking setup.

On October 8, 2026, Google released version 4.5.0 of its server-side GTM Docker image.

The release includes an updated base image with security updates to help keep server-side tagging infrastructure secure and up to date.

If you host your server-side GTM container on Stape, no action is required.

We've already updated our servers to the latest version, so your tracking setup continues running as usual.

Another significant improvement is the expansion of configuration capacity for server-side GTM containers.

With roughly 7x more space available, you can now:

• Add more tags and variable templates without quickly reaching configuration limits.
• Connect more destinations from a single sGTM container without removing existing configurations.
• Build more complex tracking setups with additional logic and advanced configurations.

This is particularly useful for agencies managing multiple tracking integrations and enterprise businesses with more demanding server-side tracking setups.

The increased capacity gives teams more flexibility to expand their tracking configurations without constantly optimizing for space.

For Stape users, no action is needed regarding the latest server image update. We've already taken care of it.

As for the expanded configuration capacity, you can start taking advantage of the additional space when building or updating your server-side GTM container.

These updates make it easier to maintain secure infrastructure and scale more complex server-side tracking setups.