Security Advisory
CVE-2026-33709
CVE vulnerability detail — eXtreme Datacenter Security Operations
Description
JupyterHub is software that allows one to create a multi-user server for Jupyter notebooks. Prior to version 5.4.4, an open redirect vulnerability in JupyterHub allows attackers to construct links which, when clicked, take users to the JupyterHub login page, after which they are sent to an arbitrary attacker-controlled site outside JupyterHub instead of a JupyterHub page, bypassing JupyterHubs check to prevent this. This issue has been patched in version 5.4.4.