# CVE-2020-26215: jupyter-notebook: Jupyter Notebook before version 6.1.5 has an Open redirect vulnerability

CVE-2020-26215 is fixed in 3 products on 1 platform, first by jupyter-notebook 5.2.2-1ubuntu0.1, released March 31, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-26215
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0123
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 18, 2020

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | jupyter-notebook Ubuntu 18.04.6 LTS (bionic) | 5.2.2-1ubuntu0.1 | [jupyter-notebook 5.2.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-jupyter-notebook-5.2.2-1ubuntu0.1.md) | Mar 31, 2022 |
| Linux | jupyter-notebook Ubuntu 20.04 LTS (focal) | 6.0.3-2ubuntu0.1 | [jupyter-notebook 6.0.3-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-jupyter-notebook-6.0.3-2ubuntu0.1.md) | Jun 14, 2022 |
| Linux | python-notebook Ubuntu 18.04.6 LTS (bionic) | 5.2.2-1ubuntu0.1 | [python-notebook 5.2.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-notebook-5.2.2-1ubuntu0.1.md) | Mar 31, 2022 |
| Linux | python3-notebook Ubuntu 18.04.6 LTS (bionic) | 5.2.2-1ubuntu0.1 | [python3-notebook 5.2.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-notebook-5.2.2-1ubuntu0.1.md) | Mar 31, 2022 |
| Linux | python3-notebook Ubuntu 20.04 LTS (focal) | 6.0.3-2ubuntu0.1 | [python3-notebook 6.0.3-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-notebook-6.0.3-2ubuntu0.1.md) | Jun 14, 2022 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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