PT-2026-38418

Name of the Vulnerable Software and Affected Versions Open Notebook version 1.8.3 Description Insufficient user input sanitization allows an application user to perform Server-Side Template Injection SSTI, a flaw where an attacker can inject malicious templates into a server-side engine. This...

a-mailx (=0.1.0), aaa-ml-datasets-course (=1.0.0) +103 more potentially affected by CVE-2026-42557 via notebook (>=7.0.0 <=7.5.5)

notebook PYPI version =7.0.0, =0.0.7, =1.0.1, =0.1.0, =1.6.4, =0.1.0, =0.0.1, =0.1.0, =0.0.1, =0.1.8, =0.0.2, =0.0.6 - compare-my-stocks =1.0.5 and more Source cves: CVE-2026-42557 Source advisory: OSV:GHSA-MQCG-5X36-VFCG...

@datalayer/jupyter-react (=0.9.5) potentially affected by CVE-2026-42557 via @jupyterlab/notebook-extension (=4.1.0-beta.0)

@jupyterlab/notebook-extension NPM version =4.1.0-beta.0 is affected by a known vulnerability. The following packages have a transitive dependency on @jupyterlab/notebook-extension and may be impacted: - @datalayer/jupyter-react =0.9.5 Source cves: CVE-2026-42557 Source advisory:...

Cross-site Scripting (XSS)

Overview @jupyterlab/rendermime-extension is an A rendermime extension for JupyterLab Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute arbitra...

@datalayer/jupyter-react (>=0.0.6 <=0.9.5), @jupyter-notebook/application-extension (>=7.1.0 <=7.4.7) +3 more potentially affected by CVE-2026-42557 via @jupyterlab/rendermime (>=4.0.0-alpha.11 <=4.4.10)

@jupyterlab/rendermime NPM version =4.0.0-alpha.11, =0.0.6, =7.1.0, =0.0.23, =1.29.0, =1.30.0-rc1 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABRENDERMIME-16438960...

Cross-site Scripting (XSS)

Overview @jupyterlab/rendermime is a JupyterLab - RenderMime Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute arbitrary commands, including co...

Cross-site Scripting (XSS)

Overview @jupyterlab/notebook is a JupyterLab - Notebook Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute arbitrary commands, including code...

GHSA-MQCG-5X36-VFCG JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content

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 ...

@datalayer/jupyter-react (>=0.0.6 <=0.9.5), @jupyter-notebook/lab-extension (>=7.1.0 <=7.4.7) +9 more potentially affected by CVE-2026-42557 via @jupyterlab/notebook (>=4.0.0-alpha.11 <=4.5.1)

@jupyterlab/notebook NPM version =4.0.0-alpha.11, =0.0.6, =7.1.0, =7.1.0, =0.0.23, =5.3.6, =1.0.0, =1.4.0 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABNOTEBOOK-16438957...

@jupyter-notebook/application (>=7.2.0 <=7.4.7), @jupyterlite/application (>=0.4.0 <=0.6.4) +4 more potentially affected by CVE-2026-42557 via @jupyterlab/rendermime-interfaces (>=3.10.7 <=3.12.10)

@jupyterlab/rendermime-interfaces NPM version =3.10.7, =7.2.0, =0.4.0, =0.4.0, =0.4.0, =0.4.0, =0.1.1, =0.2.2 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABRENDERMIMEINTERFACES-16438959...

JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content

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 ...

Cross-site Scripting (XSS)

Overview @jupyterlab/notebook-extension is a JupyterLab - Notebook Extension Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute arbitrary...

Cross-site Scripting (XSS)

Overview @jupyterlab/apputils-extension is a JupyterLab - Application Utilities Extension Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute...

CVE-2026-40171

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with...

DEBIAN-CVE-2026-40171

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with...

UBUNTU-CVE-2026-40171

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with...

CVE-2026-40171

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with...

CVE-2026-40171 Jupyter Notebook and JupyterLab token theft via stored XSS in help command linker

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with...

CVE-2026-40171

CVE-2026-40171 affects Jupyter components prior to fixes: Notebook 7.0.0–7.5.5, JupyterLab up to 4.5.6, and related help extensions (@jupyter-notebook/help-extension, @jupyterlab/help-extension). The root cause is a stored XSS in the CommandLinker used by the Help Extension, which can be chained ...

CVE-2026-40171

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with...