PT-2026-59330

Impact A stored Cross-Site Scripting XSS vulnerability in Jupyter Notebook allows attackers to steal authentication tokens from users who open malicious notebook files and interact with elements that the attacker can make look indistinguishable from legitimate controls single click interaction. T...

PT-2026-59329

JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with ...

PT-2026-59272

marimo before 0.23.9 contains a reflected cross-site scripting vulnerability in the notebook page that allows unauthenticated attackers to inject arbitrary JavaScript by exploiting improper escaping of single quotes in the file query parameter reflected into an inline JavaScript string literal...

PT-2026-59194

Impact The vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature. A malicious user can access any data that the attacked user has access to as well as perform arbitrary requests acting as the attacked user...

PT-2026-59196

Impact A stored Cross-Site Scripting XSS vulnerability in Jupyter Notebook allows attackers to steal authentication tokens from users who open malicious notebook files and interact with elements that the attacker can make look indistinguishable from legitimate controls single click interaction. T...

CVE-2026-49851 vulnerabilities

Vulnerabilities for packages: jupyter-base-notebook, kubeflow-pipelines-visualization-server...

GHSA-QCQ2-496W-V96P vulnerabilities

Vulnerabilities for packages: jupyter-base-notebook, kubeflow-pipelines-visualization-server...

PYSEC-2026-2531 Improper Neutralization of Input During Web Page Generation in Jupyter Notebook

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. Access to the content of resources has been demonstrated with Internet Explorer through capturing of erro...

PYSEC-2026-2683 Open Redirect vulnerability in jupyterhub and notebook

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.8 and some browsers Chrome, Firefox in JupyterHub before 0.9.6 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a baseurl prefix are not affecte...

PYSEC-2026-1286 Dagster Local File Inclusion vulnerability

Local File Inclusion in dagster.grpc.impl.getnotebookdata in Dagster 1.10.14 allows attackers with access to the gRPC server to read arbitrary files by supplying path traversal sequences in the notebookpath field of ExternalNotebookData requests, bypassing the intended extension-based check...

Dagster Local File Inclusion vulnerability

Local File Inclusion in dagster.grpc.impl.getnotebookdata in Dagster 1.10.14 allows attackers with access to the gRPC server to read arbitrary files by supplying path traversal sequences in the notebookpath field of ExternalNotebookData requests, bypassing the intended extension-based check...

HTML injection in Jupyter Notebook and JupyterLab leading to DOM Clobbering

ImpactThe vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature.A malicious user can access any data that the attacked user has access to as well as perform arbitrary requests acting as the attacked user...

PYSEC-2026-1481 HTML injection in Jupyter Notebook and JupyterLab leading to DOM Clobbering

Impact The vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature. A malicious user can access any data that the attacked user has access to as well as perform arbitrary requests acting as the attacked user...

PYSEC-2026-688 JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>

Impact Untrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook. Patches Patched in the following versions: 3.1.4, 3.0.17, 2.3.2, 2.2.10, 1.2.21. References OWASP Page on Restricting Form Submissions For more information If you have...

PYSEC-2026-647 Open Redirect vulnerability in jupyterhub and notebook

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.8 and some browsers Chrome, Firefox in JupyterHub before 0.9.6 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a baseurl prefix are not affecte...

[SECURITY] Fedora 43 Update: python-jupytext-1.19.4-1.fc43

Have you always wished Jupyter notebooks were plain text documents? Wished you could edit them in your favorite IDE? And get clear and meaningful diffs when doing version control? Then... Jupytext may well be the tool you're looking for! Jupytext is a plugin for Jupyter that can save Jupyter...

[SECURITY] Fedora 44 Update: python-jupytext-1.19.4-1.fc44

Have you always wished Jupyter notebooks were plain text documents? Wished you could edit them in your favorite IDE? And get clear and meaningful diffs when doing version control? Then... Jupytext may well be the tool you're looking for! Jupytext is a plugin for Jupyter that can save Jupyter...

SUSE CVE-2026-6658

A vulnerability in jupyter/nbconvert versions tag. This vulnerability impacts any server using nbconvert to render notebooks as HTML, allowing attackers to execute arbitrary JavaScript in the context of users viewing the HTML export...

CVE-2026-6658

A vulnerability in jupyter/nbconvert versions tag. This vulnerability impacts any server using nbconvert to render notebooks as HTML, allowing attackers to execute arbitrary JavaScript in the context of users viewing the HTML export...

128autograder-ipython (1.0.0rc2), 3-04-2025-ttm (0.1.0) +6295 more potentially affected by CVE-2026-6658 via nbconvert (>=4.2.0, <=7.17.1)

nbconvert PYPI version =4.2.0, =0.5.0a0, =0.1.0, =1.0.3, =0.1.8, =0.1.0, =0.0.0, =1.0.0, =0.11.0, =0.11.2 and more Source cves: CVE-2026-6658 Source advisory: SNYK:PYTHON-NBCONVERT-17707798...