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CVE-2026-33709

JupyterHub

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.

CVSS 6.1EPSS 0.22399999999999998%Risk 0.62
View source
Published
2026-04-03 22:16:26
Affected versions
<5.4.4
Type
Installed app
Last modified
2026-07-24 22:10:00
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N