JupyterLab: Command link trust prompt in JupyterLab can trust a document other than the one clicked

Summary

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.7 until 4.5.11 and 4.6.4, the markdownviewer:trust and notebook:trust command-link handlers use tracker.currentWidget to resolve the current Markdown viewer or notebook when the user answers rather than retaining the document whose command button was clicked. If another document becomes current while the prompt is open and the user chooses Trust, JupyterLab marks the second document trusted while leaving the clicked document untrusted. Later command buttons in the incorrectly trusted document run without a prompt, and trusting a notebook marks all cells trusted, saves unsaved edits, and persists the server signature to disk. Applications that bundle JupyterLab, including affected Notebook and JupyterLite releases, inherit the behavior. This issue is fixed in versions 4.5.11 and 4.6.4.

Timeline

1. Oct 13, 2026, 3:19 PM UTCCVE published
2. Oct 13, 2026, 4:08 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 13, 2026, 4:09 PM UTCRecord last updated

Affected versions

• jupyterlab jupyterlab

  From 4.5.7 · fixed in 4.5.11; From 4.6.0 · fixed in 4.6.4

• jupyterlab jupyterlite-core

  From 0.7.5 · fixed in 0.8.4

• jupyterlab notebook

  From 7.5.6 · fixed in 7.6.3

• jupyterlabPyPI

  From 4.6.0 · fixed in 4.6.4

• jupyterlabPyPI

  From 4.5.7 · fixed in 4.5.11

• notebookPyPI

  From 7.5.6 · fixed in 7.6.3

• jupyterlite-corePyPI

  From 0.7.5 · fixed in 0.8.4

References 6