PYSEC-2026-647

    Dashboard / Vulnerabilities / PYSEC-2026-647

    PYSEC-2026-647

    Published: 2 Jul 2026Last Modified: 13 Jul 2026

    Summary: Open Redirect vulnerability in jupyterhub and notebook

    Details: An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.8 and some browsers (Chrome, Firefox) in JupyterHub before 0.9.6 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.

    References: https://nvd.nist.gov/vuln/detail/CVE-2019-10255, https://github.com/jupyter/notebook/commit/08c4c898182edbe97aadef1815cce50448f975cb, https://github.com/jupyter/notebook/commit/70fe9f0ddb3023162ece21fbb77d5564306b913b, https://github.com/jupyter/notebook/commit/d65328d4841892b412aef9015165db1eb029a8ed, https://blog.jupyter.org/open-redirect-vulnerability-in-jupyter-jupyterhub-adf43583f1e4, https://github.com/advisories/GHSA-rv62-4pmj-xw6h, https://github.com/jupyter/notebook, https://github.com/jupyter/notebook/compare/05aa4b2...16cf97c, https://lists.fedoraproject.org/archives/list/[email protected]/message/UP5RLEES2JBBNSNLBR65XM6PCD4EMF7D, https://lists.fedoraproject.org/archives/list/[email protected]/message/VMDPJBVXOVO6LYGAT46VZNHH6JKSCURO, https://pypi.org/project/jupyterhub

    Affected packages

    Package

    Name: jupyterhub

    Purl: pkg:pypi/jupyterhub

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.9.6

    Affected versions

    0.1.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PYSEC-2026-647 | CVE-DB