p PatchFirst

CVE-2026-102831

CVE-2026-102831 · JupyterLab: Cross-site scripting (XSS) in JupyterLab via notebook cells pasted from the system clipboard

This page contains facts from public vulnerability sources. Check the original advisory before updating.

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From JupyterLab 4.5.0 until 4.5.11 and 4.6.4, from Notebook 7.5.0 until 7.6.3, and from JupyterLite Core 0.7.0 until 0.8.4, the system clipboard cell-paste path accepts attacker-controlled cell JSON without clearing metadata.trusted. When useSystemClipboardForCells is active and pasteCodeCellsWithoutOutput is disabled, a pasted code cell can mark HTML output as trusted, bypass output sanitization, and execute script in the authenticated JupyterLab origin without executing the cell. Markdown and raw cells are not affected because their output is sanitized. This issue is fixed in JupyterLab 4.5.11 and 4.6.4, Notebook 7.6.3, and JupyterLite Core 0.8.4.

CVSS 8.1 · High · EPSS 0.2% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • jupyterlab

    Versions
    • >= 4.5.0, < 4.5.11: Affected
    • >= 4.6.0, < 4.6.4: Affected

    No fix published

  • notebook

    Versions
    • >= 7.5.0, < 7.6.3: Affected

    No fix published

  • jupyterlite-core

    Versions
    • >= 0.7.0, < 0.8.4: Affected

    No fix published

  • jupyter-notebook Debian:12

    Versions
    • 6.4.12-2.2
    • 6.4.13-1
    • 6.4.13-2
    • 6.4.13-3
    • 6.4.13-4
    • 6.4.13-5
    • 7.0.0-1
    • 7.0.0-2
    • 7.4.7-1
    • 7.4.7-2
    • 7.4.7-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyter-notebook Debian:13

    Versions
    • 6.4.13-5
    • 7.0.0-1
    • 7.0.0-2
    • 7.4.7-1
    • 7.4.7-2
    • 7.4.7-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyter-notebook Debian:14

    Versions
    • 6.4.13-5
    • 7.0.0-1
    • 7.0.0-2
    • 7.4.7-1
    • 7.4.7-2
    • 7.4.7-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterlab PyPI

    Versions
    • 4.6.0
    • 4.6.1
    • 4.6.2
    • 4.6.3
    Affected ranges
    • ECOSYSTEM: ≥ 4.6.0, < 4.6.4

    Update to 4.6.4

  • jupyterlab PyPI

    Versions
    • 4.5.0
    • 4.5.1
    • 4.5.10
    • 4.5.2
    • 4.5.3
    • 4.5.4
    • 4.5.5
    • 4.5.6
    • 4.5.7
    • 4.5.8
    • 4.5.9
    Affected ranges
    • ECOSYSTEM: ≥ 4.5.0, < 4.5.11

    Update to 4.5.11

  • notebook PyPI

    Versions
    • 7.5.0
    • 7.5.1
    • 7.5.2
    • 7.5.3
    • 7.5.4
    • 7.5.5
    • 7.5.6
    • 7.5.7
    • 7.6.0
    • 7.6.0a0
    • 7.6.0a1
    • 7.6.0a2
    • 7.6.0a3
    • 7.6.0a4
    • 7.6.0a5
    • 7.6.0b0
    • 7.6.0b1
    • 7.6.0rc0
    • 7.6.0rc1
    • 7.6.1
    • 7.6.2
    Affected ranges
    • ECOSYSTEM: ≥ 7.5.0, < 7.6.3

    Update to 7.6.3

  • jupyterlite PyPI

    Versions
    • 0.7.0
    • 0.7.1
    • 0.7.2
    • 0.7.3
    • 0.7.4
    • 0.7.5
    • 0.7.6
    • 0.8.0
    • 0.8.0a0
    • 0.8.0a1
    • 0.8.0a2
    • 0.8.0b0
    • 0.8.0b1
    • 0.8.0rc0
    • 0.8.1
    • 0.8.2
    • 0.8.3
    Affected ranges
    • ECOSYSTEM: ≥ 0.7.0, < 0.8.4

    Update to 0.8.4

  • jupyterlite-core PyPI

    Versions
    • 0.7.0
    • 0.7.1
    • 0.7.2
    • 0.7.3
    • 0.7.4
    • 0.7.5
    • 0.7.6
    • 0.8.0
    • 0.8.0a0
    • 0.8.0a1
    • 0.8.0a2
    • 0.8.0b0
    • 0.8.0b1
    • 0.8.0rc0
    • 0.8.1
    • 0.8.2
    • 0.8.3
    Affected ranges
    • ECOSYSTEM: ≥ 0.7.0, < 0.8.4

    Update to 0.8.4

  • jupyterlab PyPI

    Versions
    • 4.5.0
    • 4.5.1
    • 4.5.10
    • 4.5.2
    • 4.5.3
    • 4.5.4
    • 4.5.5
    • 4.5.6
    • 4.5.7
    • 4.5.8
    • 4.5.9
    • 4.6.0
    • 4.6.1
    • 4.6.2
    • 4.6.3
    Affected ranges
    • ECOSYSTEM: ≥ 4.5.0, < 4.5.11 ∪ ≥ 4.6.0, < 4.6.4

    Update to 4.5.11; Update to 4.6.4

  • notebook PyPI

    Versions
    • 7.5.0
    • 7.5.1
    • 7.5.2
    • 7.5.3
    • 7.5.4
    • 7.5.5
    • 7.5.6
    • 7.5.7
    • 7.5.8
    • 7.6.0
    • 7.6.0a0
    • 7.6.0a1
    • 7.6.0a2
    • 7.6.0a3
    • 7.6.0a4
    • 7.6.0a5
    • 7.6.0b0
    • 7.6.0b1
    • 7.6.0rc0
    • 7.6.0rc1
    • 7.6.1
    • 7.6.2
    Affected ranges
    • ECOSYSTEM: ≥ 7.5.0, < 7.6.3

    Update to 7.6.3

  • jupyter-notebook Ubuntu:18.04:LTS

    Versions
    • 4.2.3-4
    • 5.1.0-2
    • 5.2.1-2
    • 5.2.2-1
    • 5.2.2-1ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyter-notebook Ubuntu:20.04:LTS

    Versions
    • 5.7.8-1
    • 6.0.0-1
    • 6.0.0-2
    • 6.0.2-1
    • 6.0.3-1
    • 6.0.3-2
    • 6.0.3-2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyter-notebook Ubuntu:Pro:22.04:LTS

    Versions
    • 6.2.0-1
    • 6.4.5-2
    • 6.4.5-3
    • 6.4.5-4
    • 6.4.8-1
    • 6.4.8-1ubuntu0.1
    • 6.4.8-1ubuntu0.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyter-notebook Ubuntu:Pro:24.04:LTS

    Versions
    • 6.4.12-2.2
    • 6.4.12-2.2ubuntu1
    • 6.4.12-2.2ubuntu1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyter-notebook Ubuntu:26.10

    Versions
    • 6.4.13-5ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterlab Ubuntu:26.10

    Versions
    • 4.0.11+ds1+~cs11.25.27-9
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3
    • 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyter-notebook Ubuntu:26.04:LTS

    Versions
    • 6.4.13-5ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jupyterlab Ubuntu:26.04:LTS

    Versions
    • 4.0.11+ds1+~cs11.25.27-7
    • 4.0.11+ds1+~cs11.25.27-8
    • 4.0.11+ds1+~cs11.25.27-9
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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