CVE-2020-26232: Open redirect in Jupyter Server

CVE-2020-26232 · Severity: low · CVSS 3.1 · Published 2020-11-24

Jupyter Server before version 1.0.6 has an Open redirect vulnerability. A maliciously crafted link to a jupyter server could redirect the browser to a different website. All jupyter servers are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may appear safe, but ultimately redirect to a spoofed server on the public internet.

Technologies: jupyter-server (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2020-26232 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2020-26232 being exploited in the wild.
How severe is CVE-2020-26232?
Low severity, with a CVSS score of 3.1, published 24 November 2020.
Which products and versions are affected?
jupyter-server (PyPI) ECOSYSTEM:introduced=0,fixed=1.0.6, GIT:introduced=0,fixed=3d83e49090289c431da253e2bdb8dc479cbcb157|ECOSYSTEM:introduced=0,fixed=1.0.6.
Is there a fix for CVE-2020-26232?
Yes. jupyter-server (PyPI): upgrade to 1.0.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2020-26232?
Check whether you run jupyter-server (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • jupyter-server (PyPI): upgrade to 1.0.6 or later
    pip install "jupyter-server>=1.0.6"

Affected products

  • jupyter-server (PyPI) ECOSYSTEM:introduced=0,fixed=1.0.6, GIT:introduced=0,fixed=3d83e49090289c431da253e2bdb8dc479cbcb157|ECOSYSTEM:introduced=0,fixed=1.0.6

Identifiers

  • CVE-2020-26232
  • GHSA-grfj-wjv9-4f9v
  • PYSEC-2020-234

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