Cross-site Scripting (XSS)

JupyterLab is vulnerable to Cross-site Scripting XSS. The vulnerability is due to insufficient validation of data-commandlinker- attributes in sanitized HTML output, which allows an attacker to craft a malicious notebook containing a deceptive button that executes arbitrary JupyterLab commands,...

Jupyterlab Python Library < 4.5.7 (CVE-2026-42557)

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. The version of JupyterLab installed on the remote host is prior to 4.5.7. It is, therefore, affected by a vulnerability: - JupyterLab's command linker attributes in HTML...

@datalayer/jupyter-react (>=0.0.6, <=0.9.5), @jupyter-notebook/application (>=7.1.0-alpha.0, <=7.4.7) +7 more potentially affected by CVE-2026-42557 via @jupyterlab/rendermime-interfaces (>=3.1.18, <=3.12.10)

@jupyterlab/rendermime-interfaces NPM version =3.1.18, =0.0.6, =7.1.0-alpha.0, =0.1.0-alpha.23, =0.1.0-alpha.7, =0.3.0-alpha.0, =0.1.0-alpha.23, =0.0.23, =0.2.0-alpha.0, =0.1.1, =0.2.2 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABRENDERMIMEINTERFACES-16438959...

Cross-site Scripting (XSS)

Overview @jupyterlab/apputils is a JupyterLab - Application Utilities 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,...

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), @mrawdon/jupyter-react (>=0.0.23, <=0.0.32) potentially affected by CVE-2026-42557 via @jupyterlab/rendermime-extension (>=4.0.0, <=4.1.0-beta.0)

@jupyterlab/rendermime-extension NPM version =4.0.0, =0.0.6, =0.0.23, =0.0.32 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABRENDERMIMEEXTENSION-16438958...

Cross-site Scripting (XSS)

Overview @jupyterlab/markdownviewer-extension is a JupyterLab - Markdown Renderer 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...

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 (0.9.5) 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:...

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

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

@datalayer/jupyter-react (>=0.0.6, <=0.9.5), @jupyter-notebook/lab-extension (>=7.1.0-rc.1, <=7.4.7) +9 more potentially affected by CVE-2026-42557 via @jupyterlab/notebook (>=4.0.0, <=4.5.1)

@jupyterlab/notebook NPM version =4.0.0, =0.0.6, =7.1.0-rc.1, =7.1.0-rc.1, =0.0.23, =5.3.6, =1.0.0, =1.4.0 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABNOTEBOOK-16438957...

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...

@fails-components/jupyter-applet-view (>=0.0.1-alpha.3, <=0.0.1-alpha.18), @fails-components/jupyter-filesystem-extension (>=0.0.1-alpha.3, <=0.0.1-alpha.18) +3 more potentially affected by CVE-2026-42557 via @jupyterlab/help-extension (>=4.0.13, <=4.4.10)

@jupyterlab/help-extension NPM version =4.0.13, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.2.0-alpha.0, =0.6.0-alpha.9 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABHELPEXTENSION-16438961...

@datalayer/jupyter-react (>=0.0.6, <=0.9.5), @jupyter-notebook/application-extension (>=7.1.0-rc.1, <=7.4.7) +3 more potentially affected by CVE-2026-42557 via @jupyterlab/rendermime (>=4.0.0, <=4.4.10)

@jupyterlab/rendermime NPM version =4.0.0, =0.0.6, =7.1.0-rc.1, =0.0.23, =1.29.0, =1.31.0 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABRENDERMIME-16438960...

@datalayer/jupyter-react (>=0.0.6, <=0.9.5), @fails-components/jupyter-applet-view (>=0.0.1-alpha.3, <=0.0.4) +21 more potentially affected by CVE-2026-42557 via @jupyterlab/apputils (>=4.0.0, <=4.5.10)

@jupyterlab/apputils NPM version =4.0.0, =0.0.6, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =0.2.0-alpha.0, =0.6.0-alpha.10, =0.6.0-alpha.10, =0.6.0-alpha.3, =0.6.0-alpha.9 and more Source cves:...

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

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

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...