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.
Scores
CVSS v3
6.1
EPSS
0.0001
EPSS Percentile
1.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-601
Status
published
Products (3)
jupyter/jupyterhub
< 5.4.4
jupyterhub/jupyterhub
< 5.4.4
pypi/jupyterhub
0 - 5.4.4PyPI
Published
Apr 03, 2026
Tracked Since
Apr 04, 2026