Open Redirect Affecting jupyter-server package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.27% (18th percentile)

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  • Snyk IDSNYK-DEBIAN13-JUPYTERSERVER-16427720
  • published6 May 2026
  • disclosed5 May 2026

Introduced: 5 May 2026

CVE-2025-61669  (opens in a new tab)
CWE-601  (opens in a new tab)

How to fix?

There is no fixed version for Debian:13 jupyter-server.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jupyter-server package and not the jupyter-server package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in LoginFormHandler._redirect_safe(), which allows redirects to arbitrary external domains via values such as ///example.com. An attacker can use a crafted login URL to redirect users to a malicious site and facilitate phishing attacks. This issue is fixed in version 2.18.0.

CVSS Base Scores

version 3.1