CVE-2019-10255: Jupyter Jupyterhub

Medium severity, CVSS 6.1. EPSS: 1.8% chance of exploitation in the next 30 days.

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.7 and some browsers (Chrome, Firefox) in JupyterHub before 0.9.5 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a base_url prefix are not affected.

Affected products

• Jupyter Jupyterhub: before 0.9.5 (fixed in 0.9.5)
• Jupyter Notebook: before 5.7.7 (fixed in 5.7.7)

Published 2019-03-28. Last modified 2026-06-17.