CVE-2026-40171Published

Jupyter Notebook and JupyterLab token theft via stored XSS in help command linker

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-40171

Published

notebook

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "jupyter",
                    "product": "notebook",
                    "versions": [
                        {
                            "version": ">=7.0.0, <= 7.5.5",
                            "status": "affected"
                        }
                    ]
                }

help-extension

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "jupyterlab",
                    "product": "help-extension",
                    "versions": [
                        {
                            "version": "<=4.5.6",
                            "status": "affected"
                        }
                    ]
                }

jupyterlab

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "jupyterlab",
                    "product": "jupyterlab",
                    "versions": [
                        {
                            "version": "<= 4.5.6",
                            "status": "affected"
                        }
                    ]
                }

help-extension

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "jupyter-notebook",
                    "product": "help-extension",
                    "versions": [
                        {
                            "version": ">=7.0.0,<= 7.5.5",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON