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Fedora 43 python-jupyter-server High Remote Code Exec CVE-2026-44727

fedora
Calendar Grey July 4, 2026
Dist Fedora Esm H88
Update for Fedora 43 addresses high-severity remote code execution issue in python-jupyter-server. Critical fixes and guidance provided.
New version fixing high-severity CVE.

Summary

The Jupyter Server provides the backend (i.e. the core services,

APIs, and REST endpoints) for Jupyter web applications like

Jupyter notebook, JupyterLab, and Voila.

Update Information:

New version fixing high-severity CVE.

Topics%20covered

Topics Covered

security advisory fedora remote code execution high python-jupyter-server CVE-2026-44727

Change Log

* Fri Jun 19 2026 Lumir Balhar - 2.20.0-1 - Update to 2.20.0 (rhbz#2489836)

References


[ 1 ] Bug #2491991 - CVE-2026-44727 python-jupyter-server: Jupyter Server: Remote Code Execution via stored Cross-Site Scripting in nbconvert handlers [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2491991

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-275d2ecbbd' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
high
Lowest
Low
Medium
High
Critical

Name: python-jupyter-server
Product: Fedora 43
Version: 2.20.0
Release: 1.fc43
URL: https://jupyter-server.readthedocs.io
Summary: The backend for Jupyter web applications

Topics%20covered

Topics Covered

security advisory fedora remote code execution high python-jupyter-server CVE-2026-44727

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