# CVE-2019-10856: Jupyter Notebook open redirect vulnerability

Source: https://junglewise.ai/threats/cve-2019-10856-jupyter-notebook-open-redirect-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-04-04  
License: CC BY 4.0 with a link back

CVE-2019-10856 · Severity: low · CVSS 3 · Published 2019-04-04

In Jupyter Notebook before 5.7.8, an open redirect can occur via an empty netloc. This issue exists because of an incomplete fix for CVE-2019-10255.

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

## Quick answers

**Is CVE-2019-10856 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-10856 being exploited in the wild.

**How severe is CVE-2019-10856?** Low severity, with a CVSS score of 3, published 4 April 2019.

**Which products and versions are affected?** notebook (PyPI) ECOSYSTEM:introduced=0,fixed=5.7.8.

**Is there a fix for CVE-2019-10856?** Yes. notebook (PyPI): upgrade to 5.7.8 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-10856?** 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 5.7.8 or later

  ```sh
  pip install "notebook>=5.7.8"
  ```


## Affected products

- notebook (PyPI) ECOSYSTEM:introduced=0,fixed=5.7.8

## Identifiers

- CVE-2019-10856
- GHSA-rcx2-m7jp-p9wj
- PYSEC-2019-158

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