# CVE-2020-26215: Open redirect in Jupyter Notebook

Source: https://junglewise.ai/threats/cve-2020-26215-open-redirect-in-jupyter-notebook  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-11-18  
License: CC BY 4.0 with a link back

CVE-2020-26215 · Severity: low · CVSS 3.1 · Published 2020-11-18

Jupyter Notebook before version 6.1.5 has an Open redirect vulnerability. A maliciously crafted link to a notebook server could redirect the browser to a different website. All notebook servers are technically affected, however, these maliciously crafted links can only be reasonably made for known notebook server hosts. A link to your notebook server may appear safe, but ultimately redirect to a spoofed server on the public internet. The issue is patched in version 6.1.5.

Technologies: [notebook (PyPI)](https://junglewise.ai/threats/technologies/pypi-notebook). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2020-26215 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-26215 being exploited in the wild.

**How severe is CVE-2020-26215?** Low severity, with a CVSS score of 3.1, published 18 November 2020.

**Which products and versions are affected?** notebook (PyPI) ECOSYSTEM:introduced=0,fixed=6.1.5, GIT:introduced=0,fixed=3cec4bbe21756de9f0c4bccf18cf61d840314d74|ECOSYSTEM:introduced=0,fixed=6.1.5.

**Is there a fix for CVE-2020-26215?** Yes. notebook (PyPI): upgrade to 6.1.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2020-26215?** Check whether you run notebook (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

- notebook (PyPI): upgrade to 6.1.5 or later

  ```sh
  pip install "notebook>=6.1.5"
  ```


## Affected products

- notebook (PyPI) ECOSYSTEM:introduced=0,fixed=6.1.5, GIT:introduced=0,fixed=3cec4bbe21756de9f0c4bccf18cf61d840314d74|ECOSYSTEM:introduced=0,fixed=6.1.5

## Identifiers

- CVE-2020-26215
- GHSA-c7vm-f5p4-8fqh
- PYSEC-2020-215

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