CVE-2019-9644: XSSI Vulnerability in Jupyter Notebook
Summary
CVE-2019-9644: An XSSI (cross-site inclusion) vulnerability in Jupyter Notebook before 5.7.6 allows inclusion of resources on malicious pages when visited by users who are authenticated with a Jupyter server. Affects notebook versions < 5.7.6. Fixed in 5.7.6. How to fix ↓
Also tracked for
- jupyter-notebook · PyPI
- jupyter-notebook · PyPI
- jupyter-notebook · Debian:11
The same CVE-2019-9644 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Jupyter Notebook is an open-source web application that allows users to create and share documents containing live code, equations, visualizations, and narrative text. It is widely used in data science and scientific computing. The vulnerability in Jupyter Notebook before version 5.7.6 allows for cross-site inclusion (XSSI), which enables the inclusion of resources from malicious pages when visited by authenticated users of a Jupyter server. This vulnerability has been demonstrated to allow access to the content of resources through Internet Explorer's error messages, although it has not been reproduced with other browsers.
Vulnerability Detail
The XSSI vulnerability in Jupyter Notebook allows malicious pages to include resources when accessed by authenticated users of a Jupyter server. This can lead to potential security risks as the content of these resources can be accessed by attackers. The vulnerability has been observed in Internet Explorer, where error messages can include the content of any encountered invalid JavaScript. The impact of this vulnerability may vary depending on the nature of the included resources and the actions performed by the attacker.
How To Fix
Latest published version: 7.6.3 as of 22 Oct 2026
pip install --upgrade "notebook==7.6.3"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
5.7.6
This is the first release that contains the fix.
pip install --upgrade "notebook==5.7.6"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The XSSI vulnerability in Jupyter Notebook before version 5.7.6 can allow inclusion of resources from malicious pages when visited by authenticated users of a Jupyter server. This can lead to potential security risks as the content of these resources can be accessed by attackers. It is recommended to upgrade to Jupyter Notebook 5.7.6 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for notebook →
FAQ
Jupyter Notebook is an open-source web application used for creating and sharing documents containing live code, equations, visualizations, and narrative text. It is commonly used in data science and scientific computing.
XSSI stands for cross-site inclusion. It is a vulnerability that allows malicious pages to include resources from other domains. In the case of Jupyter Notebook, this vulnerability enables the inclusion of resources when visited by authenticated users of a Jupyter server.
The XSSI vulnerability in Jupyter Notebook allows malicious pages to include resources by exploiting the authentication of users accessing a Jupyter server. This can lead to potential security risks as the content of these resources can be accessed by attackers.
The XSSI vulnerability has been demonstrated with Internet Explorer, where error messages can include the content of encountered invalid JavaScript. However, it has not been reproduced with other browsers.
The impact of the XSSI vulnerability in Jupyter Notebook may vary depending on the nature of the included resources and the actions performed by the attacker. It can potentially lead to unauthorized access to sensitive information or the execution of malicious code.
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