Open redirect in Jupyter Server
Priority LOW 26CWE-601Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-601.
Summary
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.
Why it matters now
EPSS 0.01004 63rd percentileScored 2026-11-07
Fix Fixed jupyter_server (jupyter): 1.0.6jupyter-server (PyPI): 1.0.6
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| jupyterlab | jupyter_server | before 1.0.6 | 1.0.6 | Patch available | CNA |
| — | jupyter-server (PyPI) | before 1.0.6 | 1.0.6 | Patch available | GHSA-grfj-wjv9-4f9v |
- jupyter_server Vendorjupyterlab Affected before 1.0.6 Fixed in 1.0.6 Patch available CNA
- jupyter-server (PyPI) Vendor— Affected before 1.0.6 Fixed in 1.0.6 Patch available GHSA-grfj-wjv9-4f9v
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jupyter:jupyter_server:*:*:*:*:*:*:*:* | before 1.0.6 | Vulnerable | jupyterlab |
- cpe:2.3:a:jupyter:jupyter_server:*:*:*:*:*:*:*:* Versions before 1.0.6 Vulnerable ·jupyterlab
Remediation
- Fix · CNA jupyter_server (jupyter) Fixed in 1.0.6
- Fix · GHSA-grfj-wjv9-4f9v jupyter-server (PyPI) Fixed in 1.0.6 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26232
- 2026-10-03 Alias added: GHSA-grfj-wjv9-4f9v
References
Patch 1
Advisory 3
More jupyterlab Jupyter Server vulnerabilities
- TI-2026-05842 CORS Origin Validation Bypass in jupyter-server CVSS 3.1HIGH 8.8
- TI-2026-04748 Path Traversal in jupyter/jupyter CVSS 3.1HIGH 8.1
- TI-2026-27533 jupyter-server path traversal allows access to sibling directories sharing root_dir name prefix CVSS 4.0HIGH 7.6
- TI-2025-38102 jupyter_server next parameter open redirect can redirect users to external domains CVSS 4.0MEDIUM 6.3
- TI-2026-32614 Jupyter Server: Stored XSS in `NbconvertFileHandler` / `NbconvertPostHandler` via missing `sandbox` CSP CVSS 4.0CRITICAL 9.3
- TI-2024-23252 Jupyter server on Windows discloses Windows user password hash CVSS 3.1HIGH 7.5
Sources
- CVE-2020-26232 · CVE Program
- CVE-2020-26232 · NVD
- FIRST EPSS
- GHSA-grfj-wjv9-4f9v · GitHub Advisory Database · CC BY 4.0
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