Jupyterhub

The recently disclosed CopyFail Linux kernel zero-day (CVE-2026-31431) opens up a way for code running inside a container to break out onto the underlying node. We took a close look at our hubs to confirm whether they were exposed, confirmed that our hubs are likely not at risk, and added another layer of protection just in case.

To facilitate communities using JupyterHub for a workshop, we introduced the idea of a ‘shared password’ based authentication a few years ago. This lets communities set a single global password that is handed out to all workshop attendees (instead of collecting email addresses or GitHub usernames before the workshop starts).

We’ve completed a major round of infrastructure upgrades across all 2i2c-managed hubs - every hub is now running Kubernetes 1.34 and Z2JH helm chart 4.3.3. Running up-to-date versions of both Kubernetes and the JupyterHub helm chart ensures that our communities get the best support and reliability, both in terms of features and security.

We’re excited to share that Jenny Wong has been invited to join the JupyterHub team as a contributor and maintainer. Jenny’s contributions to nbgitpuller and grafana-dashboards, along with her active participation in project meetings and community planning, earned her this recognition from the JupyterHub community.

One of our favorite things to see: communities learning from and building on each other’s work! MAAP recently contributed infrastructure configuration inspired by EarthScope’s approach to handling authentication tokens. Both communities need to pass OAuth tokens into user environments so their SDKs can access protected data - and MAAP adapted EarthScope’s pattern to fit their needs.

The Science Platforms Coordination IHDEA working group (which includes our own Jim Colliander) is developing international standard software computing environments for Heliophysics. The working group recently presented their work at two major conferences: ML-Helio in Madrid and DASH/IHDEA in San Antonio.

CIROH published a post on their DocuHub blog about their cloud infrastructure success at DevCon 2025, highlighting how their JupyterHub deployment supported the conference’s interactive computing needs. Read the full post: DevCon 2025 Infrastructure

Managing user groups in JupyterHub can be a challenging task, especially in environments with dynamic user bases and complex group structures. This post describes how we can leverage the latest group management features in JupyterHub, along with Prometheus and Grafana, to monitor group-level resource usage effectively.

We are excited to announce that all 2i2c hubs now run JupyterHub 5.0! This is an upgrade that brings some exciting new features and improvements. Some of the highlights include:

On most research oriented JupyterHub installations, users would like to customize their server (the environment, resources available, etc) after logging in. In Kubernetes based JupyterHub environments, a profile list provides this functionality.