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CVE-2026-33709

CVE-2026-33709 · JupyterHub has an Open Redirect Vulnerability

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 5.1 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • jupyterhub

    Versions
    • < 5.4.4: Affected

    No fix published

  • jupyterhub Debian:12

    Versions
    • 3.0.0+ds1-1
    • 5.0.0+ds1-1
    • 5.0.0+ds1-2
    • 5.0.0+ds1-3
    • 5.0.0+ds1-4
    • 5.2.1+ds1-1
    • 5.2.1+ds1-2
    • 5.2.1+ds1-3
    • 5.2.1+ds1-4
    • 5.2.1+ds1-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterhub Debian:13

    Versions
    • 5.2.1+ds1-4
    • 5.2.1+ds1-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterhub Debian:14

    Versions
    • 5.2.1+ds1-4
    • 5.2.1+ds1-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterhub PyPI

    Versions
    • 0.1.0
    • 0.2.0
    • 0.3.0
    • 0.4.0
    • 0.4.1
    • 0.5.0
    • 0.6.0
    • 0.6.1
    • 0.7.0
    • 0.7.0b1
    • 0.7.1
    • 0.7.2
    • 0.8.0
    • 0.8.0b1
    • 0.8.0b2
    • 0.8.0b3
    • 0.8.0b4
    • 0.8.0b5
    • 0.8.0rc1
    • 0.8.0rc2
    • 0.8.1
    • 0.9.0
    • 0.9.0b1
    • 0.9.0b2
    • 0.9.0b3
    • 0.9.0rc1
    • 0.9.1
    • 0.9.2
    • 0.9.3
    • 0.9.4
    • 0.9.5
    • 0.9.6
    • 1.0.0
    • 1.0.0b1
    • 1.0.0b2
    • 1.1.0
    • 1.1.0b1
    • 1.2.0
    • 1.2.0b1
    • 1.2.1
    • 1.2.2
    • 1.3.0
    • 1.4.0
    • 1.4.1
    • 1.4.2
    • 1.5.0
    • 1.5.1
    • 2.0.0
    • 2.0.0b1
    • 2.0.0b2
    • 2.0.0b3
    • 2.0.0rc1
    • 2.0.0rc2
    • 2.0.0rc3
    • 2.0.0rc4
    • 2.0.0rc5
    • 2.0.1
    • 2.0.2
    • 2.1.0
    • 2.1.1
    • 2.2.0
    • 2.2.1
    • 2.2.2
    • 2.3.0
    • 2.3.1
    • 3.0.0
    • 3.0.0b1
    • 3.1.0
    • 3.1.1
    • 4.0.0
    • 4.0.0b1
    • 4.0.0b2
    • 4.0.1
    • 4.0.2
    • 4.1.0
    • 4.1.1
    • 4.1.2
    • 4.1.3
    • 4.1.4
    • 4.1.5
    • 4.1.6
    • 5.0.0
    • 5.0.0b1
    • 5.0.0b2
    • 5.1.0
    • 5.2.0
    • 5.2.1
    • 5.3.0
    • 5.3.0rc0
    • 5.4.0
    • 5.4.1
    • 5.4.2
    • 5.4.3
    Affected ranges
    • ECOSYSTEM: < 5.4.4

    Update to 5.4.4

  • jupyterhub Ubuntu:22.04:LTS

    Versions
    • 2.0.0+ds1-1
    • 2.0.0+ds1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterhub Ubuntu:24.04:LTS

    Versions
    • 3.0.0+ds1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterhub Ubuntu:25.10

    Versions
    • 5.2.1+ds1-2
    • 5.2.1+ds1-3
    • 5.2.1+ds1-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterhub Ubuntu:26.10

    Versions
    • 5.2.1+ds1-4
    • 5.2.1+ds1-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterhub Ubuntu:26.04:LTS

    Versions
    • 5.2.1+ds1-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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