CVE-2020-26215

Name: CVE-2020-26215
Creator: NVD / NIST
Published: 2020-11-18T22:15:11.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2020-26215 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.21%

64.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Jupyter	Notebook	< 6.1.5
Debian	Debian Linux	9.0

References

https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74Patch, Third Party Advisory
https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqhThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00004.htmlThird Party Advisory
https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74Patch, Third Party Advisory
https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqhThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00004.htmlThird Party Advisory

Timeline

Published: Nov 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26215?

How severe is CVE-2020-26215?

CVE-2020-26215 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26215?

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-2020-26215?

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

Scan your code now

Source: NVD / NIST