id: PYSEC-2026-2683
published: "2026-07-09T16:49:32.462887Z"
modified: "2026-07-13T16:05:05.059561Z"
aliases:
- CVE-2019-10255
- GHSA-rv62-4pmj-xw6h
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.
affected:
- package:
    name: notebook
    ecosystem: PyPI
    purl: pkg:pypi/notebook
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 5.7.8
  versions:
  - 0.0.0
  - 4.0.0
  - 4.0.1
  - 4.0.2
  - 4.0.4
  - 4.0.5
  - 4.0.6
  - 4.1.0
  - 4.2.0
  - 4.2.0b1
  - 4.2.1
  - 4.2.2
  - 4.2.3
  - 4.3.0
  - 4.3.1
  - 4.3.2
  - 4.4.0
  - 4.4.1
  - 5.0.0
  - 5.0.0b1
  - 5.0.0b2
  - 5.0.0rc1
  - 5.0.0rc2
  - 5.1.0
  - 5.1.0rc1
  - 5.1.0rc2
  - 5.1.0rc3
  - 5.2.0
  - 5.2.0rc1
  - 5.2.1
  - 5.2.1rc1
  - 5.2.2
  - 5.3.0
  - 5.3.0rc1
  - 5.3.1
  - 5.4.0
  - 5.4.1
  - 5.5.0
  - 5.5.0rc1
  - 5.6.0
  - 5.6.0rc1
  - 5.7.0
  - 5.7.1
  - 5.7.2
  - 5.7.3
  - 5.7.4
  - 5.7.5
  - 5.7.6
references:
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2019-10255
- type: WEB
  url: https://github.com/jupyter/notebook/commit/08c4c898182edbe97aadef1815cce50448f975cb
- type: WEB
  url: https://github.com/jupyter/notebook/commit/70fe9f0ddb3023162ece21fbb77d5564306b913b
- type: WEB
  url: https://github.com/jupyter/notebook/commit/d65328d4841892b412aef9015165db1eb029a8ed
- type: WEB
  url: https://blog.jupyter.org/open-redirect-vulnerability-in-jupyter-jupyterhub-adf43583f1e4
- type: ADVISORY
  url: https://github.com/advisories/GHSA-rv62-4pmj-xw6h
- type: PACKAGE
  url: https://github.com/jupyter/notebook
- type: WEB
  url: https://github.com/jupyter/notebook/compare/05aa4b2...16cf97c
- type: WEB
  url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UP5RLEES2JBBNSNLBR65XM6PCD4EMF7D
- type: WEB
  url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VMDPJBVXOVO6LYGAT46VZNHH6JKSCURO
- type: PACKAGE
  url: https://pypi.org/project/notebook
severity:
- type: CVSS_V3
  score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N