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 JupyterHub's check to prevent this. This issue has been patched in version 5.4.4.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| jupyterhub | jupyterhub | < 5.4.4 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | jupyterhub | No fix yet | — |
| Debian 13 | jupyterhub | No fix yet | — |
| Debian 12 | jupyterhub | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | jupyterhub | No fix yet | — |
| Ubuntu 26.04 LTS | jupyterhub | No fix yet | — |
| Ubuntu 25.10 | jupyterhub | No fix yet | — |
| Ubuntu 24.04 LTS | jupyterhub | No fix yet | — |
| Ubuntu 22.04 LTS | jupyterhub | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | jupyterhub | < 5.4.4 | 5.4.4 | GHSA-3vff-hjqv-m7h8 |