JupyterLab: Cross-site scripting (XSS) in JupyterLab via notebook cells pasted from the system clipboard

Date Oct 1, 2026

Type Vendor advisory

Signal High-risk advisory

Vendor / Product PyPI · jupyterlab

CVE CVE-2026-102831

High-risk advisory CVE-2026-102831

Summary

JupyterLab: Cross-site scripting (XSS) in JupyterLab via notebook cells pasted from the system clipboard

Why it matters

GitHub has published a reviewed security advisory for jupyterlab. Prioritize it with other application dependency updates, especially because EPSS places it in the 8% percentile.

Operator check

Check whether jupyterlab is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.2%; percentile: 8%.

Sources

GitHub Advisory GHSA-6966-vjj6-99xv NVD — CVE-2026-102831 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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