CVE-2020-26232

Name: CVE-2020-26232
Creator: NVD / NIST
Published: 2020-11-24T21:15:11.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2020-26232 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.82%

52.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Jupyter	Jupyter Server	< 1.0.6

References

https://github.com/jupyter-server/jupyter_server/blob/master/CHANGELOG.md#106---2020-11-18Release Notes, Third Party Advisory
https://github.com/jupyter-server/jupyter_server/commit/3d83e49090289c431da253e2bdb8dc479cbcb157Patch, Third Party Advisory
https://github.com/jupyter/jupyter_server/security/advisories/GHSA-grfj-wjv9-4f9vThird Party Advisory
https://github.com/jupyter-server/jupyter_server/blob/master/CHANGELOG.md#106---2020-11-18Release Notes, Third Party Advisory
https://github.com/jupyter-server/jupyter_server/commit/3d83e49090289c431da253e2bdb8dc479cbcb157Patch, Third Party Advisory
https://github.com/jupyter/jupyter_server/security/advisories/GHSA-grfj-wjv9-4f9vThird Party Advisory

Timeline

Published: Nov 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26232?

How severe is CVE-2020-26232?

CVE-2020-26232 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26232?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26232?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST