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Vulnerability record · CVE-2020-26215 · published 18 November 2020

CVE-2020-26215: Jupyter notebook open redirect vulnerability

Jupyter · Notebook

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.

6.1 CVSS 3.1 Medium EPSS 1.2% · top 32.3% CWE-601 · Open redirect
6.1CVSS 3.1 base score, v2 5.8
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74 PatchThird Party Advisory
https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html Third Party Advisory
https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74 PatchThird Party Advisory
https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-26215), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.