Open redirect in Jupyter Server
Impact
What kind of vulnerability is it? Who is impacted?
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.
This originated in jupyter/notebook: https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh
Patches
Has the problem been patched? What versions should users upgrade to?
jupyter_server 1.0.6
References
For more information
If you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list security@ipython.org.
Credit: zhuonan li of Alibaba Application Security Team
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | jupyter-server | < 1.0.6 | 1.0.6 |
References
- https://github.com/jupyter/jupyter_server/security/advisories/GHSA-grfj-wjv9-4f9v
- https://github.com/jupyter-server/jupyter_server/blob/master/CHANGELOG.md#106---2020-11-18
- https://github.com/jupyter-server/jupyter_server/commit/3d83e49090289c431da253e2bdb8dc479cbcb157
- https://nvd.nist.gov/vuln/detail/CVE-2020-26232
- https://github.com/jupyter-server/jupyter_server
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2020-234.yaml
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N- Weakness (CWE)
CWE-601- Platform
- Python (PyPI)
- Package
jupyter-server- Disclosed
- 24.11.2020
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2020-234 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-grfj-wjv9-4f9v - CC BY 4.0
Vulnerability history: jupyter-server
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 14
- First → latest
- 11.2020 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 7
- Medium 6
Disclosures per year
- 2020: 2
- 2021: 0
- 2022: 2
- 2023: 3
- 2024: 1
- 2025: 0
- 2026: 6
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